Update json-iterator vendor to v1.1.5

We already have it vendored for a Kube package we import, but we
want a more recent version with additional bugfixes over the 1.0
release we originally had.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

91 files changed, 5891 insertions, 3174 deletions

diff --git a/vendor/github.com/json-iterator/go/README.md b/vendor/github.com/json-iterator/go/README.md
index 23a4b57c8..54d5afe95 100644
--- a/vendor/github.com/json-iterator/go/README.md
+++ b/vendor/github.com/json-iterator/go/README.md
@@ -8,6 +8,8 @@
 
 A high-performance 100% compatible drop-in replacement of "encoding/json"
 
+You can also use thrift like JSON using [thrift-iterator](https://github.com/thrift-iterator/go)
+
 ```
 Go开发者们请加入我们，滴滴出行平台技术部 taowen@didichuxing.com
 ```
@@ -29,6 +31,9 @@ Raw Result (easyjson requires static code generation)
 | easyjson encode | 883 ns/op | 576 B/op | 3 allocs/op |
 | jsoniter encode | 837 ns/op | 384 B/op | 4 allocs/op |
 
+Always benchmark with your own workload. 
+The result depends heavily on the data input.
+
 # Usage
 
 100% compatibility with standard lib
@@ -44,7 +49,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Marshal(&data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Marshal(&data)
 ```
 
 Replace
@@ -58,7 +65,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Unmarshal(input, &data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Unmarshal(input, &data)
 ```
 
 [More documentation](http://jsoniter.com/migrate-from-go-std.html)
@@ -76,5 +85,7 @@ Contributors
 * [thockin](https://github.com/thockin) 
 * [mattn](https://github.com/mattn)
 * [cch123](https://github.com/cch123)
+* [Oleg Shaldybin](https://github.com/olegshaldybin)
+* [Jason Toffaletti](https://github.com/toffaletti)
 
 Report issue or pull request, or email taowen@gmail.com, or [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)
diff --git a/vendor/github.com/json-iterator/go/feature_adapter.go b/vendor/github.com/json-iterator/go/adapter.go
index edb477c4f..e674d0f39 100644
--- a/vendor/github.com/json-iterator/go/feature_adapter.go
+++ b/vendor/github.com/json-iterator/go/adapter.go
@@ -16,15 +16,6 @@ func Unmarshal(data []byte, v interface{}) error {
 	return ConfigDefault.Unmarshal(data, v)
 }
 
-func lastNotSpacePos(data []byte) int {
-	for i := len(data) - 1; i >= 0; i-- {
-		if data[i] != ' ' && data[i] != '\t' && data[i] != '\r' && data[i] != '\n' {
-			return i + 1
-		}
-	}
-	return 0
-}
-
 // UnmarshalFromString convenient method to read from string instead of []byte
 func UnmarshalFromString(str string, v interface{}) error {
 	return ConfigDefault.UnmarshalFromString(str, v)
@@ -71,6 +62,11 @@ type Decoder struct {
 
 // Decode decode JSON into interface{}
 func (adapter *Decoder) Decode(obj interface{}) error {
+	if adapter.iter.head == adapter.iter.tail && adapter.iter.reader != nil {
+		if !adapter.iter.loadMore() {
+			return io.EOF
+		}
+	}
 	adapter.iter.ReadVal(obj)
 	err := adapter.iter.Error
 	if err == io.EOF {
@@ -81,7 +77,16 @@ func (adapter *Decoder) Decode(obj interface{}) error {
 
 // More is there more?
 func (adapter *Decoder) More() bool {
-	return adapter.iter.head != adapter.iter.tail
+	iter := adapter.iter
+	if iter.Error != nil {
+		return false
+	}
+	c := iter.nextToken()
+	if c == 0 {
+		return false
+	}
+	iter.unreadByte()
+	return c != ']' && c != '}'
 }
 
 // Buffered remaining buffer
@@ -90,11 +95,21 @@ func (adapter *Decoder) Buffered() io.Reader {
 	return bytes.NewReader(remaining)
 }
 
-// UseNumber for number JSON element, use float64 or json.NumberValue (alias of string)
+// UseNumber causes the Decoder to unmarshal a number into an interface{} as a
+// Number instead of as a float64.
 func (adapter *Decoder) UseNumber() {
-	origCfg := adapter.iter.cfg.configBeforeFrozen
-	origCfg.UseNumber = true
-	adapter.iter.cfg = origCfg.Froze().(*frozenConfig)
+	cfg := adapter.iter.cfg.configBeforeFrozen
+	cfg.UseNumber = true
+	adapter.iter.cfg = cfg.frozeWithCacheReuse(adapter.iter.cfg.extraExtensions)
+}
+
+// DisallowUnknownFields causes the Decoder to return an error when the destination
+// is a struct and the input contains object keys which do not match any
+// non-ignored, exported fields in the destination.
+func (adapter *Decoder) DisallowUnknownFields() {
+	cfg := adapter.iter.cfg.configBeforeFrozen
+	cfg.DisallowUnknownFields = true
+	adapter.iter.cfg = cfg.frozeWithCacheReuse(adapter.iter.cfg.extraExtensions)
 }
 
 // NewEncoder same as json.NewEncoder
@@ -110,18 +125,26 @@ type Encoder struct {
 // Encode encode interface{} as JSON to io.Writer
 func (adapter *Encoder) Encode(val interface{}) error {
 	adapter.stream.WriteVal(val)
+	adapter.stream.WriteRaw("\n")
 	adapter.stream.Flush()
 	return adapter.stream.Error
 }
 
 // SetIndent set the indention. Prefix is not supported
 func (adapter *Encoder) SetIndent(prefix, indent string) {
-	adapter.stream.cfg.indentionStep = len(indent)
+	config := adapter.stream.cfg.configBeforeFrozen
+	config.IndentionStep = len(indent)
+	adapter.stream.cfg = config.frozeWithCacheReuse(adapter.stream.cfg.extraExtensions)
 }
 
 // SetEscapeHTML escape html by default, set to false to disable
 func (adapter *Encoder) SetEscapeHTML(escapeHTML bool) {
 	config := adapter.stream.cfg.configBeforeFrozen
 	config.EscapeHTML = escapeHTML
-	adapter.stream.cfg = config.Froze().(*frozenConfig)
+	adapter.stream.cfg = config.frozeWithCacheReuse(adapter.stream.cfg.extraExtensions)
+}
+
+// Valid reports whether data is a valid JSON encoding.
+func Valid(data []byte) bool {
+	return ConfigDefault.Valid(data)
 }
diff --git a/vendor/github.com/json-iterator/go/feature_any.go b/vendor/github.com/json-iterator/go/any.go
index 6733dce4c..daecfed61 100644
--- a/vendor/github.com/json-iterator/go/feature_any.go
+++ b/vendor/github.com/json-iterator/go/any.go
@@ -1,9 +1,13 @@
 package jsoniter
 
 import (
+	"errors"
 	"fmt"
+	"github.com/modern-go/reflect2"
 	"io"
 	"reflect"
+	"strconv"
+	"unsafe"
 )
 
 // Any generic object representation.
@@ -24,7 +28,6 @@ type Any interface {
 	ToString() string
 	ToVal(val interface{})
 	Get(path ...interface{}) Any
-	// TODO: add Set
 	Size() int
 	Keys() []string
 	GetInterface() interface{}
@@ -34,7 +37,7 @@ type Any interface {
 type baseAny struct{}
 
 func (any *baseAny) Get(path ...interface{}) Any {
-	return &invalidAny{baseAny{}, fmt.Errorf("Get %v from simple value", path)}
+	return &invalidAny{baseAny{}, fmt.Errorf("GetIndex %v from simple value", path)}
 }
 
 func (any *baseAny) Size() int {
@@ -88,7 +91,7 @@ func Wrap(val interface{}) Any {
 	if isAny {
 		return asAny
 	}
-	typ := reflect.TypeOf(val)
+	typ := reflect2.TypeOf(val)
 	switch typ.Kind() {
 	case reflect.Slice:
 		return wrapArray(val)
@@ -99,6 +102,9 @@ func Wrap(val interface{}) Any {
 	case reflect.String:
 		return WrapString(val.(string))
 	case reflect.Int:
+		if strconv.IntSize == 32 {
+			return WrapInt32(int32(val.(int)))
+		}
 		return WrapInt64(int64(val.(int)))
 	case reflect.Int8:
 		return WrapInt32(int32(val.(int8)))
@@ -109,7 +115,15 @@ func Wrap(val interface{}) Any {
 	case reflect.Int64:
 		return WrapInt64(val.(int64))
 	case reflect.Uint:
+		if strconv.IntSize == 32 {
+			return WrapUint32(uint32(val.(uint)))
+		}
 		return WrapUint64(uint64(val.(uint)))
+	case reflect.Uintptr:
+		if ptrSize == 32 {
+			return WrapUint32(uint32(val.(uintptr)))
+		}
+		return WrapUint64(uint64(val.(uintptr)))
 	case reflect.Uint8:
 		return WrapUint32(uint32(val.(uint8)))
 	case reflect.Uint16:
@@ -157,6 +171,8 @@ func (iter *Iterator) readAny() Any {
 		return iter.readArrayAny()
 	case '-':
 		return iter.readNumberAny(false)
+	case 0:
+		return &invalidAny{baseAny{}, errors.New("input is empty")}
 	default:
 		return iter.readNumberAny(true)
 	}
@@ -240,3 +256,66 @@ func locatePath(iter *Iterator, path []interface{}) Any {
 	}
 	return iter.readAny()
 }
+
+var anyType = reflect2.TypeOfPtr((*Any)(nil)).Elem()
+
+func createDecoderOfAny(ctx *ctx, typ reflect2.Type) ValDecoder {
+	if typ == anyType {
+		return &directAnyCodec{}
+	}
+	if typ.Implements(anyType) {
+		return &anyCodec{
+			valType: typ,
+		}
+	}
+	return nil
+}
+
+func createEncoderOfAny(ctx *ctx, typ reflect2.Type) ValEncoder {
+	if typ == anyType {
+		return &directAnyCodec{}
+	}
+	if typ.Implements(anyType) {
+		return &anyCodec{
+			valType: typ,
+		}
+	}
+	return nil
+}
+
+type anyCodec struct {
+	valType reflect2.Type
+}
+
+func (codec *anyCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	panic("not implemented")
+}
+
+func (codec *anyCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	obj := codec.valType.UnsafeIndirect(ptr)
+	any := obj.(Any)
+	any.WriteTo(stream)
+}
+
+func (codec *anyCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	obj := codec.valType.UnsafeIndirect(ptr)
+	any := obj.(Any)
+	return any.Size() == 0
+}
+
+type directAnyCodec struct {
+}
+
+func (codec *directAnyCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	*(*Any)(ptr) = iter.readAny()
+}
+
+func (codec *directAnyCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	any := *(*Any)(ptr)
+	any.WriteTo(stream)
+}
+
+func (codec *directAnyCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	any := *(*Any)(ptr)
+	return any.Size() == 0
+}
diff --git a/vendor/github.com/json-iterator/go/feature_any_array.go b/vendor/github.com/json-iterator/go/any_array.go
index 0449e9aa4..0449e9aa4 100644
--- a/vendor/github.com/json-iterator/go/feature_any_array.go
+++ b/vendor/github.com/json-iterator/go/any_array.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_bool.go b/vendor/github.com/json-iterator/go/any_bool.go
index 9452324af..9452324af 100644
--- a/vendor/github.com/json-iterator/go/feature_any_bool.go
+++ b/vendor/github.com/json-iterator/go/any_bool.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_float.go b/vendor/github.com/json-iterator/go/any_float.go
index 35fdb0949..35fdb0949 100644
--- a/vendor/github.com/json-iterator/go/feature_any_float.go
+++ b/vendor/github.com/json-iterator/go/any_float.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_int32.go b/vendor/github.com/json-iterator/go/any_int32.go
index 1b56f3991..1b56f3991 100644
--- a/vendor/github.com/json-iterator/go/feature_any_int32.go
+++ b/vendor/github.com/json-iterator/go/any_int32.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_int64.go b/vendor/github.com/json-iterator/go/any_int64.go
index c440d72b6..c440d72b6 100644
--- a/vendor/github.com/json-iterator/go/feature_any_int64.go
+++ b/vendor/github.com/json-iterator/go/any_int64.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_invalid.go b/vendor/github.com/json-iterator/go/any_invalid.go
index 1d859eac3..1d859eac3 100644
--- a/vendor/github.com/json-iterator/go/feature_any_invalid.go
+++ b/vendor/github.com/json-iterator/go/any_invalid.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_nil.go b/vendor/github.com/json-iterator/go/any_nil.go
index d04cb54c1..d04cb54c1 100644
--- a/vendor/github.com/json-iterator/go/feature_any_nil.go
+++ b/vendor/github.com/json-iterator/go/any_nil.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_number.go b/vendor/github.com/json-iterator/go/any_number.go
index 4e1c27641..9d1e901a6 100644
--- a/vendor/github.com/json-iterator/go/feature_any_number.go
+++ b/vendor/github.com/json-iterator/go/any_number.go
@@ -1,6 +1,9 @@
 package jsoniter
 
-import "unsafe"
+import (
+	"io"
+	"unsafe"
+)
 
 type numberLazyAny struct {
 	baseAny
@@ -29,7 +32,9 @@ func (any *numberLazyAny) ToInt() int {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -37,7 +42,9 @@ func (any *numberLazyAny) ToInt32() int32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt32()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -45,7 +52,9 @@ func (any *numberLazyAny) ToInt64() int64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt64()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -53,7 +62,9 @@ func (any *numberLazyAny) ToUint() uint {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -61,7 +72,9 @@ func (any *numberLazyAny) ToUint32() uint32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint32()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -69,7 +82,9 @@ func (any *numberLazyAny) ToUint64() uint64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint64()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -77,7 +92,9 @@ func (any *numberLazyAny) ToFloat32() float32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadFloat32()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
@@ -85,7 +102,9 @@ func (any *numberLazyAny) ToFloat64() float64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadFloat64()
-	any.err = iter.Error
+	if iter.Error != nil && iter.Error != io.EOF {
+		any.err = iter.Error
+	}
 	return val
 }
 
diff --git a/vendor/github.com/json-iterator/go/feature_any_object.go b/vendor/github.com/json-iterator/go/any_object.go
index c44ef5c98..c44ef5c98 100644
--- a/vendor/github.com/json-iterator/go/feature_any_object.go
+++ b/vendor/github.com/json-iterator/go/any_object.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_string.go b/vendor/github.com/json-iterator/go/any_str.go
index abf060bd5..a4b93c78c 100644
--- a/vendor/github.com/json-iterator/go/feature_any_string.go
+++ b/vendor/github.com/json-iterator/go/any_str.go
@@ -14,7 +14,7 @@ func (any *stringAny) Get(path ...interface{}) Any {
 	if len(path) == 0 {
 		return any
 	}
-	return &invalidAny{baseAny{}, fmt.Errorf("Get %v from simple value", path)}
+	return &invalidAny{baseAny{}, fmt.Errorf("GetIndex %v from simple value", path)}
 }
 
 func (any *stringAny) Parse() *Iterator {
diff --git a/vendor/github.com/json-iterator/go/feature_any_uint32.go b/vendor/github.com/json-iterator/go/any_uint32.go
index 656bbd33d..656bbd33d 100644
--- a/vendor/github.com/json-iterator/go/feature_any_uint32.go
+++ b/vendor/github.com/json-iterator/go/any_uint32.go
diff --git a/vendor/github.com/json-iterator/go/feature_any_uint64.go b/vendor/github.com/json-iterator/go/any_uint64.go
index 7df2fce33..7df2fce33 100644
--- a/vendor/github.com/json-iterator/go/feature_any_uint64.go
+++ b/vendor/github.com/json-iterator/go/any_uint64.go
diff --git a/vendor/github.com/json-iterator/go/config.go b/vendor/github.com/json-iterator/go/config.go
new file mode 100644
index 000000000..8c58fcba5
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/config.go
@@ -0,0 +1,375 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"io"
+	"reflect"
+	"sync"
+	"unsafe"
+
+	"github.com/modern-go/concurrent"
+	"github.com/modern-go/reflect2"
+)
+
+// Config customize how the API should behave.
+// The API is created from Config by Froze.
+type Config struct {
+	IndentionStep                 int
+	MarshalFloatWith6Digits       bool
+	EscapeHTML                    bool
+	SortMapKeys                   bool
+	UseNumber                     bool
+	DisallowUnknownFields         bool
+	TagKey                        string
+	OnlyTaggedField               bool
+	ValidateJsonRawMessage        bool
+	ObjectFieldMustBeSimpleString bool
+	CaseSensitive                 bool
+}
+
+// API the public interface of this package.
+// Primary Marshal and Unmarshal.
+type API interface {
+	IteratorPool
+	StreamPool
+	MarshalToString(v interface{}) (string, error)
+	Marshal(v interface{}) ([]byte, error)
+	MarshalIndent(v interface{}, prefix, indent string) ([]byte, error)
+	UnmarshalFromString(str string, v interface{}) error
+	Unmarshal(data []byte, v interface{}) error
+	Get(data []byte, path ...interface{}) Any
+	NewEncoder(writer io.Writer) *Encoder
+	NewDecoder(reader io.Reader) *Decoder
+	Valid(data []byte) bool
+	RegisterExtension(extension Extension)
+	DecoderOf(typ reflect2.Type) ValDecoder
+	EncoderOf(typ reflect2.Type) ValEncoder
+}
+
+// ConfigDefault the default API
+var ConfigDefault = Config{
+	EscapeHTML: true,
+}.Froze()
+
+// ConfigCompatibleWithStandardLibrary tries to be 100% compatible with standard library behavior
+var ConfigCompatibleWithStandardLibrary = Config{
+	EscapeHTML:             true,
+	SortMapKeys:            true,
+	ValidateJsonRawMessage: true,
+}.Froze()
+
+// ConfigFastest marshals float with only 6 digits precision
+var ConfigFastest = Config{
+	EscapeHTML:                    false,
+	MarshalFloatWith6Digits:       true, // will lose precession
+	ObjectFieldMustBeSimpleString: true, // do not unescape object field
+}.Froze()
+
+type frozenConfig struct {
+	configBeforeFrozen            Config
+	sortMapKeys                   bool
+	indentionStep                 int
+	objectFieldMustBeSimpleString bool
+	onlyTaggedField               bool
+	disallowUnknownFields         bool
+	decoderCache                  *concurrent.Map
+	encoderCache                  *concurrent.Map
+	encoderExtension              Extension
+	decoderExtension              Extension
+	extraExtensions               []Extension
+	streamPool                    *sync.Pool
+	iteratorPool                  *sync.Pool
+	caseSensitive                 bool
+}
+
+func (cfg *frozenConfig) initCache() {
+	cfg.decoderCache = concurrent.NewMap()
+	cfg.encoderCache = concurrent.NewMap()
+}
+
+func (cfg *frozenConfig) addDecoderToCache(cacheKey uintptr, decoder ValDecoder) {
+	cfg.decoderCache.Store(cacheKey, decoder)
+}
+
+func (cfg *frozenConfig) addEncoderToCache(cacheKey uintptr, encoder ValEncoder) {
+	cfg.encoderCache.Store(cacheKey, encoder)
+}
+
+func (cfg *frozenConfig) getDecoderFromCache(cacheKey uintptr) ValDecoder {
+	decoder, found := cfg.decoderCache.Load(cacheKey)
+	if found {
+		return decoder.(ValDecoder)
+	}
+	return nil
+}
+
+func (cfg *frozenConfig) getEncoderFromCache(cacheKey uintptr) ValEncoder {
+	encoder, found := cfg.encoderCache.Load(cacheKey)
+	if found {
+		return encoder.(ValEncoder)
+	}
+	return nil
+}
+
+var cfgCache = concurrent.NewMap()
+
+func getFrozenConfigFromCache(cfg Config) *frozenConfig {
+	obj, found := cfgCache.Load(cfg)
+	if found {
+		return obj.(*frozenConfig)
+	}
+	return nil
+}
+
+func addFrozenConfigToCache(cfg Config, frozenConfig *frozenConfig) {
+	cfgCache.Store(cfg, frozenConfig)
+}
+
+// Froze forge API from config
+func (cfg Config) Froze() API {
+	api := &frozenConfig{
+		sortMapKeys:                   cfg.SortMapKeys,
+		indentionStep:                 cfg.IndentionStep,
+		objectFieldMustBeSimpleString: cfg.ObjectFieldMustBeSimpleString,
+		onlyTaggedField:               cfg.OnlyTaggedField,
+		disallowUnknownFields:         cfg.DisallowUnknownFields,
+		caseSensitive:                 cfg.CaseSensitive,
+	}
+	api.streamPool = &sync.Pool{
+		New: func() interface{} {
+			return NewStream(api, nil, 512)
+		},
+	}
+	api.iteratorPool = &sync.Pool{
+		New: func() interface{} {
+			return NewIterator(api)
+		},
+	}
+	api.initCache()
+	encoderExtension := EncoderExtension{}
+	decoderExtension := DecoderExtension{}
+	if cfg.MarshalFloatWith6Digits {
+		api.marshalFloatWith6Digits(encoderExtension)
+	}
+	if cfg.EscapeHTML {
+		api.escapeHTML(encoderExtension)
+	}
+	if cfg.UseNumber {
+		api.useNumber(decoderExtension)
+	}
+	if cfg.ValidateJsonRawMessage {
+		api.validateJsonRawMessage(encoderExtension)
+	}
+	api.encoderExtension = encoderExtension
+	api.decoderExtension = decoderExtension
+	api.configBeforeFrozen = cfg
+	return api
+}
+
+func (cfg Config) frozeWithCacheReuse(extraExtensions []Extension) *frozenConfig {
+	api := getFrozenConfigFromCache(cfg)
+	if api != nil {
+		return api
+	}
+	api = cfg.Froze().(*frozenConfig)
+	for _, extension := range extraExtensions {
+		api.RegisterExtension(extension)
+	}
+	addFrozenConfigToCache(cfg, api)
+	return api
+}
+
+func (cfg *frozenConfig) validateJsonRawMessage(extension EncoderExtension) {
+	encoder := &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		rawMessage := *(*json.RawMessage)(ptr)
+		iter := cfg.BorrowIterator([]byte(rawMessage))
+		iter.Read()
+		if iter.Error != nil {
+			stream.WriteRaw("null")
+		} else {
+			cfg.ReturnIterator(iter)
+			stream.WriteRaw(string(rawMessage))
+		}
+	}, func(ptr unsafe.Pointer) bool {
+		return len(*((*json.RawMessage)(ptr))) == 0
+	}}
+	extension[reflect2.TypeOfPtr((*json.RawMessage)(nil)).Elem()] = encoder
+	extension[reflect2.TypeOfPtr((*RawMessage)(nil)).Elem()] = encoder
+}
+
+func (cfg *frozenConfig) useNumber(extension DecoderExtension) {
+	extension[reflect2.TypeOfPtr((*interface{})(nil)).Elem()] = &funcDecoder{func(ptr unsafe.Pointer, iter *Iterator) {
+		exitingValue := *((*interface{})(ptr))
+		if exitingValue != nil && reflect.TypeOf(exitingValue).Kind() == reflect.Ptr {
+			iter.ReadVal(exitingValue)
+			return
+		}
+		if iter.WhatIsNext() == NumberValue {
+			*((*interface{})(ptr)) = json.Number(iter.readNumberAsString())
+		} else {
+			*((*interface{})(ptr)) = iter.Read()
+		}
+	}}
+}
+func (cfg *frozenConfig) getTagKey() string {
+	tagKey := cfg.configBeforeFrozen.TagKey
+	if tagKey == "" {
+		return "json"
+	}
+	return tagKey
+}
+
+func (cfg *frozenConfig) RegisterExtension(extension Extension) {
+	cfg.extraExtensions = append(cfg.extraExtensions, extension)
+	copied := cfg.configBeforeFrozen
+	cfg.configBeforeFrozen = copied
+}
+
+type lossyFloat32Encoder struct {
+}
+
+func (encoder *lossyFloat32Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat32Lossy(*((*float32)(ptr)))
+}
+
+func (encoder *lossyFloat32Encoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*float32)(ptr)) == 0
+}
+
+type lossyFloat64Encoder struct {
+}
+
+func (encoder *lossyFloat64Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat64Lossy(*((*float64)(ptr)))
+}
+
+func (encoder *lossyFloat64Encoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*float64)(ptr)) == 0
+}
+
+// EnableLossyFloatMarshalling keeps 10**(-6) precision
+// for float variables for better performance.
+func (cfg *frozenConfig) marshalFloatWith6Digits(extension EncoderExtension) {
+	// for better performance
+	extension[reflect2.TypeOfPtr((*float32)(nil)).Elem()] = &lossyFloat32Encoder{}
+	extension[reflect2.TypeOfPtr((*float64)(nil)).Elem()] = &lossyFloat64Encoder{}
+}
+
+type htmlEscapedStringEncoder struct {
+}
+
+func (encoder *htmlEscapedStringEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	str := *((*string)(ptr))
+	stream.WriteStringWithHTMLEscaped(str)
+}
+
+func (encoder *htmlEscapedStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*string)(ptr)) == ""
+}
+
+func (cfg *frozenConfig) escapeHTML(encoderExtension EncoderExtension) {
+	encoderExtension[reflect2.TypeOfPtr((*string)(nil)).Elem()] = &htmlEscapedStringEncoder{}
+}
+
+func (cfg *frozenConfig) cleanDecoders() {
+	typeDecoders = map[string]ValDecoder{}
+	fieldDecoders = map[string]ValDecoder{}
+	*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
+}
+
+func (cfg *frozenConfig) cleanEncoders() {
+	typeEncoders = map[string]ValEncoder{}
+	fieldEncoders = map[string]ValEncoder{}
+	*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
+}
+
+func (cfg *frozenConfig) MarshalToString(v interface{}) (string, error) {
+	stream := cfg.BorrowStream(nil)
+	defer cfg.ReturnStream(stream)
+	stream.WriteVal(v)
+	if stream.Error != nil {
+		return "", stream.Error
+	}
+	return string(stream.Buffer()), nil
+}
+
+func (cfg *frozenConfig) Marshal(v interface{}) ([]byte, error) {
+	stream := cfg.BorrowStream(nil)
+	defer cfg.ReturnStream(stream)
+	stream.WriteVal(v)
+	if stream.Error != nil {
+		return nil, stream.Error
+	}
+	result := stream.Buffer()
+	copied := make([]byte, len(result))
+	copy(copied, result)
+	return copied, nil
+}
+
+func (cfg *frozenConfig) MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
+	if prefix != "" {
+		panic("prefix is not supported")
+	}
+	for _, r := range indent {
+		if r != ' ' {
+			panic("indent can only be space")
+		}
+	}
+	newCfg := cfg.configBeforeFrozen
+	newCfg.IndentionStep = len(indent)
+	return newCfg.frozeWithCacheReuse(cfg.extraExtensions).Marshal(v)
+}
+
+func (cfg *frozenConfig) UnmarshalFromString(str string, v interface{}) error {
+	data := []byte(str)
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.ReadVal(v)
+	c := iter.nextToken()
+	if c == 0 {
+		if iter.Error == io.EOF {
+			return nil
+		}
+		return iter.Error
+	}
+	iter.ReportError("Unmarshal", "there are bytes left after unmarshal")
+	return iter.Error
+}
+
+func (cfg *frozenConfig) Get(data []byte, path ...interface{}) Any {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	return locatePath(iter, path)
+}
+
+func (cfg *frozenConfig) Unmarshal(data []byte, v interface{}) error {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.ReadVal(v)
+	c := iter.nextToken()
+	if c == 0 {
+		if iter.Error == io.EOF {
+			return nil
+		}
+		return iter.Error
+	}
+	iter.ReportError("Unmarshal", "there are bytes left after unmarshal")
+	return iter.Error
+}
+
+func (cfg *frozenConfig) NewEncoder(writer io.Writer) *Encoder {
+	stream := NewStream(cfg, writer, 512)
+	return &Encoder{stream}
+}
+
+func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
+	iter := Parse(cfg, reader, 512)
+	return &Decoder{iter}
+}
+
+func (cfg *frozenConfig) Valid(data []byte) bool {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.Skip()
+	return iter.Error == nil
+}
diff --git a/vendor/github.com/json-iterator/go/feature_config.go b/vendor/github.com/json-iterator/go/feature_config.go
deleted file mode 100644
index fc055d504..000000000
--- a/vendor/github.com/json-iterator/go/feature_config.go
+++ /dev/null
@@ -1,312 +0,0 @@
-package jsoniter
-
-import (
-	"encoding/json"
-	"errors"
-	"io"
-	"reflect"
-	"sync/atomic"
-	"unsafe"
-)
-
-// Config customize how the API should behave.
-// The API is created from Config by Froze.
-type Config struct {
-	IndentionStep           int
-	MarshalFloatWith6Digits bool
-	EscapeHTML              bool
-	SortMapKeys             bool
-	UseNumber               bool
-	TagKey                  string
-}
-
-type frozenConfig struct {
-	configBeforeFrozen Config
-	sortMapKeys        bool
-	indentionStep      int
-	decoderCache       unsafe.Pointer
-	encoderCache       unsafe.Pointer
-	extensions         []Extension
-	streamPool         chan *Stream
-	iteratorPool       chan *Iterator
-}
-
-// API the public interface of this package.
-// Primary Marshal and Unmarshal.
-type API interface {
-	IteratorPool
-	StreamPool
-	MarshalToString(v interface{}) (string, error)
-	Marshal(v interface{}) ([]byte, error)
-	MarshalIndent(v interface{}, prefix, indent string) ([]byte, error)
-	UnmarshalFromString(str string, v interface{}) error
-	Unmarshal(data []byte, v interface{}) error
-	Get(data []byte, path ...interface{}) Any
-	NewEncoder(writer io.Writer) *Encoder
-	NewDecoder(reader io.Reader) *Decoder
-}
-
-// ConfigDefault the default API
-var ConfigDefault = Config{
-	EscapeHTML: true,
-}.Froze()
-
-// ConfigCompatibleWithStandardLibrary tries to be 100% compatible with standard library behavior
-var ConfigCompatibleWithStandardLibrary = Config{
-	EscapeHTML:  true,
-	SortMapKeys: true,
-}.Froze()
-
-// ConfigFastest marshals float with only 6 digits precision
-var ConfigFastest = Config{
-	EscapeHTML:              false,
-	MarshalFloatWith6Digits: true,
-}.Froze()
-
-// Froze forge API from config
-func (cfg Config) Froze() API {
-	// TODO: cache frozen config
-	frozenConfig := &frozenConfig{
-		sortMapKeys:   cfg.SortMapKeys,
-		indentionStep: cfg.IndentionStep,
-		streamPool:    make(chan *Stream, 16),
-		iteratorPool:  make(chan *Iterator, 16),
-	}
-	atomic.StorePointer(&frozenConfig.decoderCache, unsafe.Pointer(&map[string]ValDecoder{}))
-	atomic.StorePointer(&frozenConfig.encoderCache, unsafe.Pointer(&map[string]ValEncoder{}))
-	if cfg.MarshalFloatWith6Digits {
-		frozenConfig.marshalFloatWith6Digits()
-	}
-	if cfg.EscapeHTML {
-		frozenConfig.escapeHTML()
-	}
-	if cfg.UseNumber {
-		frozenConfig.useNumber()
-	}
-	frozenConfig.configBeforeFrozen = cfg
-	return frozenConfig
-}
-
-func (cfg *frozenConfig) useNumber() {
-	cfg.addDecoderToCache(reflect.TypeOf((*interface{})(nil)).Elem(), &funcDecoder{func(ptr unsafe.Pointer, iter *Iterator) {
-		if iter.WhatIsNext() == NumberValue {
-			*((*interface{})(ptr)) = json.Number(iter.readNumberAsString())
-		} else {
-			*((*interface{})(ptr)) = iter.Read()
-		}
-	}})
-}
-func (cfg *frozenConfig) getTagKey() string {
-	tagKey := cfg.configBeforeFrozen.TagKey
-	if tagKey == "" {
-		return "json"
-	}
-	return tagKey
-}
-
-func (cfg *frozenConfig) registerExtension(extension Extension) {
-	cfg.extensions = append(cfg.extensions, extension)
-}
-
-type lossyFloat32Encoder struct {
-}
-
-func (encoder *lossyFloat32Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteFloat32Lossy(*((*float32)(ptr)))
-}
-
-func (encoder *lossyFloat32Encoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *lossyFloat32Encoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*float32)(ptr)) == 0
-}
-
-type lossyFloat64Encoder struct {
-}
-
-func (encoder *lossyFloat64Encoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteFloat64Lossy(*((*float64)(ptr)))
-}
-
-func (encoder *lossyFloat64Encoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *lossyFloat64Encoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*float64)(ptr)) == 0
-}
-
-// EnableLossyFloatMarshalling keeps 10**(-6) precision
-// for float variables for better performance.
-func (cfg *frozenConfig) marshalFloatWith6Digits() {
-	// for better performance
-	cfg.addEncoderToCache(reflect.TypeOf((*float32)(nil)).Elem(), &lossyFloat32Encoder{})
-	cfg.addEncoderToCache(reflect.TypeOf((*float64)(nil)).Elem(), &lossyFloat64Encoder{})
-}
-
-type htmlEscapedStringEncoder struct {
-}
-
-func (encoder *htmlEscapedStringEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	str := *((*string)(ptr))
-	stream.WriteStringWithHTMLEscaped(str)
-}
-
-func (encoder *htmlEscapedStringEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *htmlEscapedStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*string)(ptr)) == ""
-}
-
-func (cfg *frozenConfig) escapeHTML() {
-	cfg.addEncoderToCache(reflect.TypeOf((*string)(nil)).Elem(), &htmlEscapedStringEncoder{})
-}
-
-func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder ValDecoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&cfg.decoderCache)
-		cache := *(*map[reflect.Type]ValDecoder)(ptr)
-		copied := map[reflect.Type]ValDecoder{}
-		for k, v := range cache {
-			copied[k] = v
-		}
-		copied[cacheKey] = decoder
-		done = atomic.CompareAndSwapPointer(&cfg.decoderCache, ptr, unsafe.Pointer(&copied))
-	}
-}
-
-func (cfg *frozenConfig) addEncoderToCache(cacheKey reflect.Type, encoder ValEncoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&cfg.encoderCache)
-		cache := *(*map[reflect.Type]ValEncoder)(ptr)
-		copied := map[reflect.Type]ValEncoder{}
-		for k, v := range cache {
-			copied[k] = v
-		}
-		copied[cacheKey] = encoder
-		done = atomic.CompareAndSwapPointer(&cfg.encoderCache, ptr, unsafe.Pointer(&copied))
-	}
-}
-
-func (cfg *frozenConfig) getDecoderFromCache(cacheKey reflect.Type) ValDecoder {
-	ptr := atomic.LoadPointer(&cfg.decoderCache)
-	cache := *(*map[reflect.Type]ValDecoder)(ptr)
-	return cache[cacheKey]
-}
-
-func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) ValEncoder {
-	ptr := atomic.LoadPointer(&cfg.encoderCache)
-	cache := *(*map[reflect.Type]ValEncoder)(ptr)
-	return cache[cacheKey]
-}
-
-func (cfg *frozenConfig) cleanDecoders() {
-	typeDecoders = map[string]ValDecoder{}
-	fieldDecoders = map[string]ValDecoder{}
-	*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
-}
-
-func (cfg *frozenConfig) cleanEncoders() {
-	typeEncoders = map[string]ValEncoder{}
-	fieldEncoders = map[string]ValEncoder{}
-	*cfg = *(cfg.configBeforeFrozen.Froze().(*frozenConfig))
-}
-
-func (cfg *frozenConfig) MarshalToString(v interface{}) (string, error) {
-	stream := cfg.BorrowStream(nil)
-	defer cfg.ReturnStream(stream)
-	stream.WriteVal(v)
-	if stream.Error != nil {
-		return "", stream.Error
-	}
-	return string(stream.Buffer()), nil
-}
-
-func (cfg *frozenConfig) Marshal(v interface{}) ([]byte, error) {
-	stream := cfg.BorrowStream(nil)
-	defer cfg.ReturnStream(stream)
-	stream.WriteVal(v)
-	if stream.Error != nil {
-		return nil, stream.Error
-	}
-	result := stream.Buffer()
-	copied := make([]byte, len(result))
-	copy(copied, result)
-	return copied, nil
-}
-
-func (cfg *frozenConfig) MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
-	if prefix != "" {
-		panic("prefix is not supported")
-	}
-	for _, r := range indent {
-		if r != ' ' {
-			panic("indent can only be space")
-		}
-	}
-	newCfg := cfg.configBeforeFrozen
-	newCfg.IndentionStep = len(indent)
-	return newCfg.Froze().Marshal(v)
-}
-
-func (cfg *frozenConfig) UnmarshalFromString(str string, v interface{}) error {
-	data := []byte(str)
-	data = data[:lastNotSpacePos(data)]
-	iter := cfg.BorrowIterator(data)
-	defer cfg.ReturnIterator(iter)
-	iter.ReadVal(v)
-	if iter.head == iter.tail {
-		iter.loadMore()
-	}
-	if iter.Error == io.EOF {
-		return nil
-	}
-	if iter.Error == nil {
-		iter.ReportError("UnmarshalFromString", "there are bytes left after unmarshal")
-	}
-	return iter.Error
-}
-
-func (cfg *frozenConfig) Get(data []byte, path ...interface{}) Any {
-	iter := cfg.BorrowIterator(data)
-	defer cfg.ReturnIterator(iter)
-	return locatePath(iter, path)
-}
-
-func (cfg *frozenConfig) Unmarshal(data []byte, v interface{}) error {
-	data = data[:lastNotSpacePos(data)]
-	iter := cfg.BorrowIterator(data)
-	defer cfg.ReturnIterator(iter)
-	typ := reflect.TypeOf(v)
-	if typ.Kind() != reflect.Ptr {
-		// return non-pointer error
-		return errors.New("the second param must be ptr type")
-	}
-	iter.ReadVal(v)
-	if iter.head == iter.tail {
-		iter.loadMore()
-	}
-	if iter.Error == io.EOF {
-		return nil
-	}
-	if iter.Error == nil {
-		iter.ReportError("Unmarshal", "there are bytes left after unmarshal")
-	}
-	return iter.Error
-}
-
-func (cfg *frozenConfig) NewEncoder(writer io.Writer) *Encoder {
-	stream := NewStream(cfg, writer, 512)
-	return &Encoder{stream}
-}
-
-func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
-	iter := Parse(cfg, reader, 512)
-	return &Decoder{iter}
-}
diff --git a/vendor/github.com/json-iterator/go/feature_json_number.go b/vendor/github.com/json-iterator/go/feature_json_number.go
deleted file mode 100644
index 0439f6725..000000000
--- a/vendor/github.com/json-iterator/go/feature_json_number.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package jsoniter
-
-import "encoding/json"
-
-type Number string
-
-func CastJsonNumber(val interface{}) (string, bool) {
-	switch typedVal := val.(type) {
-	case json.Number:
-		return string(typedVal), true
-	case Number:
-		return string(typedVal), true
-	}
-	return "", false
-}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect.go b/vendor/github.com/json-iterator/go/feature_reflect.go
deleted file mode 100644
index 05d91b49c..000000000
--- a/vendor/github.com/json-iterator/go/feature_reflect.go
+++ /dev/null
@@ -1,691 +0,0 @@
-package jsoniter
-
-import (
-	"encoding"
-	"encoding/json"
-	"fmt"
-	"reflect"
-	"time"
-	"unsafe"
-)
-
-// ValDecoder is an internal type registered to cache as needed.
-// Don't confuse jsoniter.ValDecoder with json.Decoder.
-// For json.Decoder's adapter, refer to jsoniter.AdapterDecoder(todo link).
-//
-// Reflection on type to create decoders, which is then cached
-// Reflection on value is avoided as we can, as the reflect.Value itself will allocate, with following exceptions
-// 1. create instance of new value, for example *int will need a int to be allocated
-// 2. append to slice, if the existing cap is not enough, allocate will be done using Reflect.New
-// 3. assignment to map, both key and value will be reflect.Value
-// For a simple struct binding, it will be reflect.Value free and allocation free
-type ValDecoder interface {
-	Decode(ptr unsafe.Pointer, iter *Iterator)
-}
-
-// ValEncoder is an internal type registered to cache as needed.
-// Don't confuse jsoniter.ValEncoder with json.Encoder.
-// For json.Encoder's adapter, refer to jsoniter.AdapterEncoder(todo godoc link).
-type ValEncoder interface {
-	IsEmpty(ptr unsafe.Pointer) bool
-	Encode(ptr unsafe.Pointer, stream *Stream)
-	EncodeInterface(val interface{}, stream *Stream)
-}
-
-type checkIsEmpty interface {
-	IsEmpty(ptr unsafe.Pointer) bool
-}
-
-// WriteToStream the default implementation for TypeEncoder method EncodeInterface
-func WriteToStream(val interface{}, stream *Stream, encoder ValEncoder) {
-	e := (*emptyInterface)(unsafe.Pointer(&val))
-	if e.word == nil {
-		stream.WriteNil()
-		return
-	}
-	if reflect.TypeOf(val).Kind() == reflect.Ptr {
-		encoder.Encode(unsafe.Pointer(&e.word), stream)
-	} else {
-		encoder.Encode(e.word, stream)
-	}
-}
-
-var jsonNumberType reflect.Type
-var jsoniterNumberType reflect.Type
-var jsonRawMessageType reflect.Type
-var jsoniterRawMessageType reflect.Type
-var anyType reflect.Type
-var marshalerType reflect.Type
-var unmarshalerType reflect.Type
-var textMarshalerType reflect.Type
-var textUnmarshalerType reflect.Type
-
-func init() {
-	jsonNumberType = reflect.TypeOf((*json.Number)(nil)).Elem()
-	jsoniterNumberType = reflect.TypeOf((*Number)(nil)).Elem()
-	jsonRawMessageType = reflect.TypeOf((*json.RawMessage)(nil)).Elem()
-	jsoniterRawMessageType = reflect.TypeOf((*RawMessage)(nil)).Elem()
-	anyType = reflect.TypeOf((*Any)(nil)).Elem()
-	marshalerType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
-	unmarshalerType = reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
-	textMarshalerType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
-	textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
-}
-
-type optionalDecoder struct {
-	valueType    reflect.Type
-	valueDecoder ValDecoder
-}
-
-func (decoder *optionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*unsafe.Pointer)(ptr)) = nil
-	} else {
-		if *((*unsafe.Pointer)(ptr)) == nil {
-			//pointer to null, we have to allocate memory to hold the value
-			value := reflect.New(decoder.valueType)
-			newPtr := extractInterface(value.Interface()).word
-			decoder.valueDecoder.Decode(newPtr, iter)
-			*((*uintptr)(ptr)) = uintptr(newPtr)
-		} else {
-			//reuse existing instance
-			decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
-		}
-	}
-}
-
-type deferenceDecoder struct {
-	// only to deference a pointer
-	valueType    reflect.Type
-	valueDecoder ValDecoder
-}
-
-func (decoder *deferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if *((*unsafe.Pointer)(ptr)) == nil {
-		//pointer to null, we have to allocate memory to hold the value
-		value := reflect.New(decoder.valueType)
-		newPtr := extractInterface(value.Interface()).word
-		decoder.valueDecoder.Decode(newPtr, iter)
-		*((*uintptr)(ptr)) = uintptr(newPtr)
-	} else {
-		//reuse existing instance
-		decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
-	}
-}
-
-type optionalEncoder struct {
-	valueEncoder ValEncoder
-}
-
-func (encoder *optionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	if *((*unsafe.Pointer)(ptr)) == nil {
-		stream.WriteNil()
-	} else {
-		encoder.valueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
-	}
-}
-
-func (encoder *optionalEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *optionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	if *((*unsafe.Pointer)(ptr)) == nil {
-		return true
-	}
-	return false
-}
-
-type placeholderEncoder struct {
-	cfg      *frozenConfig
-	cacheKey reflect.Type
-}
-
-func (encoder *placeholderEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	encoder.getRealEncoder().Encode(ptr, stream)
-}
-
-func (encoder *placeholderEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return encoder.getRealEncoder().IsEmpty(ptr)
-}
-
-func (encoder *placeholderEncoder) getRealEncoder() ValEncoder {
-	for i := 0; i < 30; i++ {
-		realDecoder := encoder.cfg.getEncoderFromCache(encoder.cacheKey)
-		_, isPlaceholder := realDecoder.(*placeholderEncoder)
-		if isPlaceholder {
-			time.Sleep(time.Second)
-		} else {
-			return realDecoder
-		}
-	}
-	panic(fmt.Sprintf("real encoder not found for cache key: %v", encoder.cacheKey))
-}
-
-type placeholderDecoder struct {
-	cfg      *frozenConfig
-	cacheKey reflect.Type
-}
-
-func (decoder *placeholderDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	for i := 0; i < 30; i++ {
-		realDecoder := decoder.cfg.getDecoderFromCache(decoder.cacheKey)
-		_, isPlaceholder := realDecoder.(*placeholderDecoder)
-		if isPlaceholder {
-			time.Sleep(time.Second)
-		} else {
-			realDecoder.Decode(ptr, iter)
-			return
-		}
-	}
-	panic(fmt.Sprintf("real decoder not found for cache key: %v", decoder.cacheKey))
-}
-
-// emptyInterface is the header for an interface{} value.
-type emptyInterface struct {
-	typ  unsafe.Pointer
-	word unsafe.Pointer
-}
-
-// emptyInterface is the header for an interface with method (not interface{})
-type nonEmptyInterface struct {
-	// see ../runtime/iface.go:/Itab
-	itab *struct {
-		ityp   unsafe.Pointer // static interface type
-		typ    unsafe.Pointer // dynamic concrete type
-		link   unsafe.Pointer
-		bad    int32
-		unused int32
-		fun    [100000]unsafe.Pointer // method table
-	}
-	word unsafe.Pointer
-}
-
-// ReadVal copy the underlying JSON into go interface, same as json.Unmarshal
-func (iter *Iterator) ReadVal(obj interface{}) {
-	typ := reflect.TypeOf(obj)
-	cacheKey := typ.Elem()
-	decoder, err := decoderOfType(iter.cfg, cacheKey)
-	if err != nil {
-		iter.Error = err
-		return
-	}
-	e := (*emptyInterface)(unsafe.Pointer(&obj))
-	decoder.Decode(e.word, iter)
-}
-
-// WriteVal copy the go interface into underlying JSON, same as json.Marshal
-func (stream *Stream) WriteVal(val interface{}) {
-	if nil == val {
-		stream.WriteNil()
-		return
-	}
-	typ := reflect.TypeOf(val)
-	cacheKey := typ
-	encoder, err := encoderOfType(stream.cfg, cacheKey)
-	if err != nil {
-		stream.Error = err
-		return
-	}
-	encoder.EncodeInterface(val, stream)
-}
-
-type prefix string
-
-func (p prefix) addToDecoder(decoder ValDecoder, err error) (ValDecoder, error) {
-	if err != nil {
-		return nil, fmt.Errorf("%s: %s", p, err.Error())
-	}
-	return decoder, err
-}
-
-func (p prefix) addToEncoder(encoder ValEncoder, err error) (ValEncoder, error) {
-	if err != nil {
-		return nil, fmt.Errorf("%s: %s", p, err.Error())
-	}
-	return encoder, err
-}
-
-func decoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	cacheKey := typ
-	decoder := cfg.getDecoderFromCache(cacheKey)
-	if decoder != nil {
-		return decoder, nil
-	}
-	decoder = getTypeDecoderFromExtension(typ)
-	if decoder != nil {
-		cfg.addDecoderToCache(cacheKey, decoder)
-		return decoder, nil
-	}
-	decoder = &placeholderDecoder{cfg: cfg, cacheKey: cacheKey}
-	cfg.addDecoderToCache(cacheKey, decoder)
-	decoder, err := createDecoderOfType(cfg, typ)
-	for _, extension := range extensions {
-		decoder = extension.DecorateDecoder(typ, decoder)
-	}
-	cfg.addDecoderToCache(cacheKey, decoder)
-	return decoder, err
-}
-
-func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	typeName := typ.String()
-	if typ == jsonRawMessageType {
-		return &jsonRawMessageCodec{}, nil
-	}
-	if typ == jsoniterRawMessageType {
-		return &jsoniterRawMessageCodec{}, nil
-	}
-	if typ.AssignableTo(jsonNumberType) {
-		return &jsonNumberCodec{}, nil
-	}
-	if typ.AssignableTo(jsoniterNumberType) {
-		return &jsoniterNumberCodec{}, nil
-	}
-	if typ.Implements(unmarshalerType) {
-		templateInterface := reflect.New(typ).Elem().Interface()
-		var decoder ValDecoder = &unmarshalerDecoder{extractInterface(templateInterface)}
-		if typ.Kind() == reflect.Ptr {
-			decoder = &optionalDecoder{typ.Elem(), decoder}
-		}
-		return decoder, nil
-	}
-	if reflect.PtrTo(typ).Implements(unmarshalerType) {
-		templateInterface := reflect.New(typ).Interface()
-		var decoder ValDecoder = &unmarshalerDecoder{extractInterface(templateInterface)}
-		return decoder, nil
-	}
-	if typ.Implements(textUnmarshalerType) {
-		templateInterface := reflect.New(typ).Elem().Interface()
-		var decoder ValDecoder = &textUnmarshalerDecoder{extractInterface(templateInterface)}
-		if typ.Kind() == reflect.Ptr {
-			decoder = &optionalDecoder{typ.Elem(), decoder}
-		}
-		return decoder, nil
-	}
-	if reflect.PtrTo(typ).Implements(textUnmarshalerType) {
-		templateInterface := reflect.New(typ).Interface()
-		var decoder ValDecoder = &textUnmarshalerDecoder{extractInterface(templateInterface)}
-		return decoder, nil
-	}
-	if typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Uint8 {
-		sliceDecoder, err := prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
-		if err != nil {
-			return nil, err
-		}
-		return &base64Codec{sliceDecoder: sliceDecoder}, nil
-	}
-	if typ.Implements(anyType) {
-		return &anyCodec{}, nil
-	}
-	switch typ.Kind() {
-	case reflect.String:
-		if typeName != "string" {
-			return decoderOfType(cfg, reflect.TypeOf((*string)(nil)).Elem())
-		}
-		return &stringCodec{}, nil
-	case reflect.Int:
-		if typeName != "int" {
-			return decoderOfType(cfg, reflect.TypeOf((*int)(nil)).Elem())
-		}
-		return &intCodec{}, nil
-	case reflect.Int8:
-		if typeName != "int8" {
-			return decoderOfType(cfg, reflect.TypeOf((*int8)(nil)).Elem())
-		}
-		return &int8Codec{}, nil
-	case reflect.Int16:
-		if typeName != "int16" {
-			return decoderOfType(cfg, reflect.TypeOf((*int16)(nil)).Elem())
-		}
-		return &int16Codec{}, nil
-	case reflect.Int32:
-		if typeName != "int32" {
-			return decoderOfType(cfg, reflect.TypeOf((*int32)(nil)).Elem())
-		}
-		return &int32Codec{}, nil
-	case reflect.Int64:
-		if typeName != "int64" {
-			return decoderOfType(cfg, reflect.TypeOf((*int64)(nil)).Elem())
-		}
-		return &int64Codec{}, nil
-	case reflect.Uint:
-		if typeName != "uint" {
-			return decoderOfType(cfg, reflect.TypeOf((*uint)(nil)).Elem())
-		}
-		return &uintCodec{}, nil
-	case reflect.Uint8:
-		if typeName != "uint8" {
-			return decoderOfType(cfg, reflect.TypeOf((*uint8)(nil)).Elem())
-		}
-		return &uint8Codec{}, nil
-	case reflect.Uint16:
-		if typeName != "uint16" {
-			return decoderOfType(cfg, reflect.TypeOf((*uint16)(nil)).Elem())
-		}
-		return &uint16Codec{}, nil
-	case reflect.Uint32:
-		if typeName != "uint32" {
-			return decoderOfType(cfg, reflect.TypeOf((*uint32)(nil)).Elem())
-		}
-		return &uint32Codec{}, nil
-	case reflect.Uintptr:
-		if typeName != "uintptr" {
-			return decoderOfType(cfg, reflect.TypeOf((*uintptr)(nil)).Elem())
-		}
-		return &uintptrCodec{}, nil
-	case reflect.Uint64:
-		if typeName != "uint64" {
-			return decoderOfType(cfg, reflect.TypeOf((*uint64)(nil)).Elem())
-		}
-		return &uint64Codec{}, nil
-	case reflect.Float32:
-		if typeName != "float32" {
-			return decoderOfType(cfg, reflect.TypeOf((*float32)(nil)).Elem())
-		}
-		return &float32Codec{}, nil
-	case reflect.Float64:
-		if typeName != "float64" {
-			return decoderOfType(cfg, reflect.TypeOf((*float64)(nil)).Elem())
-		}
-		return &float64Codec{}, nil
-	case reflect.Bool:
-		if typeName != "bool" {
-			return decoderOfType(cfg, reflect.TypeOf((*bool)(nil)).Elem())
-		}
-		return &boolCodec{}, nil
-	case reflect.Interface:
-		if typ.NumMethod() == 0 {
-			return &emptyInterfaceCodec{}, nil
-		}
-		return &nonEmptyInterfaceCodec{}, nil
-	case reflect.Struct:
-		return prefix(fmt.Sprintf("[%s]", typeName)).addToDecoder(decoderOfStruct(cfg, typ))
-	case reflect.Array:
-		return prefix("[array]").addToDecoder(decoderOfArray(cfg, typ))
-	case reflect.Slice:
-		return prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
-	case reflect.Map:
-		return prefix("[map]").addToDecoder(decoderOfMap(cfg, typ))
-	case reflect.Ptr:
-		return prefix("[optional]").addToDecoder(decoderOfOptional(cfg, typ))
-	default:
-		return nil, fmt.Errorf("unsupported type: %v", typ)
-	}
-}
-
-func encoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	cacheKey := typ
-	encoder := cfg.getEncoderFromCache(cacheKey)
-	if encoder != nil {
-		return encoder, nil
-	}
-	encoder = getTypeEncoderFromExtension(typ)
-	if encoder != nil {
-		cfg.addEncoderToCache(cacheKey, encoder)
-		return encoder, nil
-	}
-	encoder = &placeholderEncoder{cfg: cfg, cacheKey: cacheKey}
-	cfg.addEncoderToCache(cacheKey, encoder)
-	encoder, err := createEncoderOfType(cfg, typ)
-	for _, extension := range extensions {
-		encoder = extension.DecorateEncoder(typ, encoder)
-	}
-	cfg.addEncoderToCache(cacheKey, encoder)
-	return encoder, err
-}
-
-func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	if typ == jsonRawMessageType {
-		return &jsonRawMessageCodec{}, nil
-	}
-	if typ == jsoniterRawMessageType {
-		return &jsoniterRawMessageCodec{}, nil
-	}
-	if typ.AssignableTo(jsonNumberType) {
-		return &jsonNumberCodec{}, nil
-	}
-	if typ.AssignableTo(jsoniterNumberType) {
-		return &jsoniterNumberCodec{}, nil
-	}
-	if typ.Implements(marshalerType) {
-		checkIsEmpty, err := createCheckIsEmpty(typ)
-		if err != nil {
-			return nil, err
-		}
-		templateInterface := reflect.New(typ).Elem().Interface()
-		var encoder ValEncoder = &marshalerEncoder{
-			templateInterface: extractInterface(templateInterface),
-			checkIsEmpty:      checkIsEmpty,
-		}
-		if typ.Kind() == reflect.Ptr {
-			encoder = &optionalEncoder{encoder}
-		}
-		return encoder, nil
-	}
-	if typ.Implements(textMarshalerType) {
-		checkIsEmpty, err := createCheckIsEmpty(typ)
-		if err != nil {
-			return nil, err
-		}
-		templateInterface := reflect.New(typ).Elem().Interface()
-		var encoder ValEncoder = &textMarshalerEncoder{
-			templateInterface: extractInterface(templateInterface),
-			checkIsEmpty:      checkIsEmpty,
-		}
-		if typ.Kind() == reflect.Ptr {
-			encoder = &optionalEncoder{encoder}
-		}
-		return encoder, nil
-	}
-	if typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Uint8 {
-		return &base64Codec{}, nil
-	}
-	if typ.Implements(anyType) {
-		return &anyCodec{}, nil
-	}
-	return createEncoderOfSimpleType(cfg, typ)
-}
-
-func createCheckIsEmpty(typ reflect.Type) (checkIsEmpty, error) {
-	kind := typ.Kind()
-	switch kind {
-	case reflect.String:
-		return &stringCodec{}, nil
-	case reflect.Int:
-		return &intCodec{}, nil
-	case reflect.Int8:
-		return &int8Codec{}, nil
-	case reflect.Int16:
-		return &int16Codec{}, nil
-	case reflect.Int32:
-		return &int32Codec{}, nil
-	case reflect.Int64:
-		return &int64Codec{}, nil
-	case reflect.Uint:
-		return &uintCodec{}, nil
-	case reflect.Uint8:
-		return &uint8Codec{}, nil
-	case reflect.Uint16:
-		return &uint16Codec{}, nil
-	case reflect.Uint32:
-		return &uint32Codec{}, nil
-	case reflect.Uintptr:
-		return &uintptrCodec{}, nil
-	case reflect.Uint64:
-		return &uint64Codec{}, nil
-	case reflect.Float32:
-		return &float32Codec{}, nil
-	case reflect.Float64:
-		return &float64Codec{}, nil
-	case reflect.Bool:
-		return &boolCodec{}, nil
-	case reflect.Interface:
-		if typ.NumMethod() == 0 {
-			return &emptyInterfaceCodec{}, nil
-		}
-		return &nonEmptyInterfaceCodec{}, nil
-	case reflect.Struct:
-		return &structEncoder{}, nil
-	case reflect.Array:
-		return &arrayEncoder{}, nil
-	case reflect.Slice:
-		return &sliceEncoder{}, nil
-	case reflect.Map:
-		return &mapEncoder{}, nil
-	case reflect.Ptr:
-		return &optionalEncoder{}, nil
-	default:
-		return nil, fmt.Errorf("unsupported type: %v", typ)
-	}
-}
-
-func createEncoderOfSimpleType(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	typeName := typ.String()
-	kind := typ.Kind()
-	switch kind {
-	case reflect.String:
-		if typeName != "string" {
-			return encoderOfType(cfg, reflect.TypeOf((*string)(nil)).Elem())
-		}
-		return &stringCodec{}, nil
-	case reflect.Int:
-		if typeName != "int" {
-			return encoderOfType(cfg, reflect.TypeOf((*int)(nil)).Elem())
-		}
-		return &intCodec{}, nil
-	case reflect.Int8:
-		if typeName != "int8" {
-			return encoderOfType(cfg, reflect.TypeOf((*int8)(nil)).Elem())
-		}
-		return &int8Codec{}, nil
-	case reflect.Int16:
-		if typeName != "int16" {
-			return encoderOfType(cfg, reflect.TypeOf((*int16)(nil)).Elem())
-		}
-		return &int16Codec{}, nil
-	case reflect.Int32:
-		if typeName != "int32" {
-			return encoderOfType(cfg, reflect.TypeOf((*int32)(nil)).Elem())
-		}
-		return &int32Codec{}, nil
-	case reflect.Int64:
-		if typeName != "int64" {
-			return encoderOfType(cfg, reflect.TypeOf((*int64)(nil)).Elem())
-		}
-		return &int64Codec{}, nil
-	case reflect.Uint:
-		if typeName != "uint" {
-			return encoderOfType(cfg, reflect.TypeOf((*uint)(nil)).Elem())
-		}
-		return &uintCodec{}, nil
-	case reflect.Uint8:
-		if typeName != "uint8" {
-			return encoderOfType(cfg, reflect.TypeOf((*uint8)(nil)).Elem())
-		}
-		return &uint8Codec{}, nil
-	case reflect.Uint16:
-		if typeName != "uint16" {
-			return encoderOfType(cfg, reflect.TypeOf((*uint16)(nil)).Elem())
-		}
-		return &uint16Codec{}, nil
-	case reflect.Uint32:
-		if typeName != "uint32" {
-			return encoderOfType(cfg, reflect.TypeOf((*uint32)(nil)).Elem())
-		}
-		return &uint32Codec{}, nil
-	case reflect.Uintptr:
-		if typeName != "uintptr" {
-			return encoderOfType(cfg, reflect.TypeOf((*uintptr)(nil)).Elem())
-		}
-		return &uintptrCodec{}, nil
-	case reflect.Uint64:
-		if typeName != "uint64" {
-			return encoderOfType(cfg, reflect.TypeOf((*uint64)(nil)).Elem())
-		}
-		return &uint64Codec{}, nil
-	case reflect.Float32:
-		if typeName != "float32" {
-			return encoderOfType(cfg, reflect.TypeOf((*float32)(nil)).Elem())
-		}
-		return &float32Codec{}, nil
-	case reflect.Float64:
-		if typeName != "float64" {
-			return encoderOfType(cfg, reflect.TypeOf((*float64)(nil)).Elem())
-		}
-		return &float64Codec{}, nil
-	case reflect.Bool:
-		if typeName != "bool" {
-			return encoderOfType(cfg, reflect.TypeOf((*bool)(nil)).Elem())
-		}
-		return &boolCodec{}, nil
-	case reflect.Interface:
-		if typ.NumMethod() == 0 {
-			return &emptyInterfaceCodec{}, nil
-		}
-		return &nonEmptyInterfaceCodec{}, nil
-	case reflect.Struct:
-		return prefix(fmt.Sprintf("[%s]", typeName)).addToEncoder(encoderOfStruct(cfg, typ))
-	case reflect.Array:
-		return prefix("[array]").addToEncoder(encoderOfArray(cfg, typ))
-	case reflect.Slice:
-		return prefix("[slice]").addToEncoder(encoderOfSlice(cfg, typ))
-	case reflect.Map:
-		return prefix("[map]").addToEncoder(encoderOfMap(cfg, typ))
-	case reflect.Ptr:
-		return prefix("[optional]").addToEncoder(encoderOfOptional(cfg, typ))
-	default:
-		return nil, fmt.Errorf("unsupported type: %v", typ)
-	}
-}
-
-func decoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	elemType := typ.Elem()
-	decoder, err := decoderOfType(cfg, elemType)
-	if err != nil {
-		return nil, err
-	}
-	return &optionalDecoder{elemType, decoder}, nil
-}
-
-func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	elemType := typ.Elem()
-	elemEncoder, err := encoderOfType(cfg, elemType)
-	if err != nil {
-		return nil, err
-	}
-	encoder := &optionalEncoder{elemEncoder}
-	if elemType.Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
-	}
-	return encoder, nil
-}
-
-func decoderOfMap(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	decoder, err := decoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	mapInterface := reflect.New(typ).Interface()
-	return &mapDecoder{typ, typ.Key(), typ.Elem(), decoder, extractInterface(mapInterface)}, nil
-}
-
-func extractInterface(val interface{}) emptyInterface {
-	return *((*emptyInterface)(unsafe.Pointer(&val)))
-}
-
-func encoderOfMap(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	elemType := typ.Elem()
-	encoder, err := encoderOfType(cfg, elemType)
-	if err != nil {
-		return nil, err
-	}
-	mapInterface := reflect.New(typ).Elem().Interface()
-	if cfg.sortMapKeys {
-		return &sortKeysMapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
-	}
-	return &mapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
-}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_array.go b/vendor/github.com/json-iterator/go/feature_reflect_array.go
deleted file mode 100644
index e23f187b7..000000000
--- a/vendor/github.com/json-iterator/go/feature_reflect_array.go
+++ /dev/null
@@ -1,99 +0,0 @@
-package jsoniter
-
-import (
-	"fmt"
-	"io"
-	"reflect"
-	"unsafe"
-)
-
-func decoderOfArray(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	decoder, err := decoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	return &arrayDecoder{typ, typ.Elem(), decoder}, nil
-}
-
-func encoderOfArray(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	encoder, err := encoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
-	}
-	return &arrayEncoder{typ, typ.Elem(), encoder}, nil
-}
-
-type arrayEncoder struct {
-	arrayType   reflect.Type
-	elemType    reflect.Type
-	elemEncoder ValEncoder
-}
-
-func (encoder *arrayEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteArrayStart()
-	elemPtr := unsafe.Pointer(ptr)
-	encoder.elemEncoder.Encode(elemPtr, stream)
-	for i := 1; i < encoder.arrayType.Len(); i++ {
-		stream.WriteMore()
-		elemPtr = unsafe.Pointer(uintptr(elemPtr) + encoder.elemType.Size())
-		encoder.elemEncoder.Encode(unsafe.Pointer(elemPtr), stream)
-	}
-	stream.WriteArrayEnd()
-	if stream.Error != nil && stream.Error != io.EOF {
-		stream.Error = fmt.Errorf("%v: %s", encoder.arrayType, stream.Error.Error())
-	}
-}
-
-func (encoder *arrayEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	// special optimization for interface{}
-	e := (*emptyInterface)(unsafe.Pointer(&val))
-	if e.word == nil {
-		stream.WriteArrayStart()
-		stream.WriteNil()
-		stream.WriteArrayEnd()
-		return
-	}
-	elemType := encoder.arrayType.Elem()
-	if encoder.arrayType.Len() == 1 && (elemType.Kind() == reflect.Ptr || elemType.Kind() == reflect.Map) {
-		ptr := uintptr(e.word)
-		e.word = unsafe.Pointer(&ptr)
-	}
-	if reflect.TypeOf(val).Kind() == reflect.Ptr {
-		encoder.Encode(unsafe.Pointer(&e.word), stream)
-	} else {
-		encoder.Encode(e.word, stream)
-	}
-}
-
-func (encoder *arrayEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return false
-}
-
-type arrayDecoder struct {
-	arrayType   reflect.Type
-	elemType    reflect.Type
-	elemDecoder ValDecoder
-}
-
-func (decoder *arrayDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	decoder.doDecode(ptr, iter)
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.arrayType, iter.Error.Error())
-	}
-}
-
-func (decoder *arrayDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
-	offset := uintptr(0)
-	iter.ReadArrayCB(func(iter *Iterator) bool {
-		if offset < decoder.arrayType.Size() {
-			decoder.elemDecoder.Decode(unsafe.Pointer(uintptr(ptr)+offset), iter)
-			offset += decoder.elemType.Size()
-		} else {
-			iter.Skip()
-		}
-		return true
-	})
-}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_map.go b/vendor/github.com/json-iterator/go/feature_reflect_map.go
deleted file mode 100644
index 005671e01..000000000
--- a/vendor/github.com/json-iterator/go/feature_reflect_map.go
+++ /dev/null
@@ -1,244 +0,0 @@
-package jsoniter
-
-import (
-	"encoding"
-	"encoding/json"
-	"reflect"
-	"sort"
-	"strconv"
-	"unsafe"
-)
-
-type mapDecoder struct {
-	mapType      reflect.Type
-	keyType      reflect.Type
-	elemType     reflect.Type
-	elemDecoder  ValDecoder
-	mapInterface emptyInterface
-}
-
-func (decoder *mapDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	// dark magic to cast unsafe.Pointer back to interface{} using reflect.Type
-	mapInterface := decoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface).Elem()
-	if iter.ReadNil() {
-		realVal.Set(reflect.Zero(decoder.mapType))
-		return
-	}
-	if realVal.IsNil() {
-		realVal.Set(reflect.MakeMap(realVal.Type()))
-	}
-	iter.ReadMapCB(func(iter *Iterator, keyStr string) bool {
-		elem := reflect.New(decoder.elemType)
-		decoder.elemDecoder.Decode(unsafe.Pointer(elem.Pointer()), iter)
-		// to put into map, we have to use reflection
-		keyType := decoder.keyType
-		// TODO: remove this from loop
-		switch {
-		case keyType.Kind() == reflect.String:
-			realVal.SetMapIndex(reflect.ValueOf(keyStr).Convert(keyType), elem.Elem())
-			return true
-		case keyType.Implements(textUnmarshalerType):
-			textUnmarshaler := reflect.New(keyType.Elem()).Interface().(encoding.TextUnmarshaler)
-			err := textUnmarshaler.UnmarshalText([]byte(keyStr))
-			if err != nil {
-				iter.ReportError("read map key as TextUnmarshaler", err.Error())
-				return false
-			}
-			realVal.SetMapIndex(reflect.ValueOf(textUnmarshaler), elem.Elem())
-			return true
-		case reflect.PtrTo(keyType).Implements(textUnmarshalerType):
-			textUnmarshaler := reflect.New(keyType).Interface().(encoding.TextUnmarshaler)
-			err := textUnmarshaler.UnmarshalText([]byte(keyStr))
-			if err != nil {
-				iter.ReportError("read map key as TextUnmarshaler", err.Error())
-				return false
-			}
-			realVal.SetMapIndex(reflect.ValueOf(textUnmarshaler).Elem(), elem.Elem())
-			return true
-		default:
-			switch keyType.Kind() {
-			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-				n, err := strconv.ParseInt(keyStr, 10, 64)
-				if err != nil || reflect.Zero(keyType).OverflowInt(n) {
-					iter.ReportError("read map key as int64", "read int64 failed")
-					return false
-				}
-				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
-				return true
-			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-				n, err := strconv.ParseUint(keyStr, 10, 64)
-				if err != nil || reflect.Zero(keyType).OverflowUint(n) {
-					iter.ReportError("read map key as uint64", "read uint64 failed")
-					return false
-				}
-				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
-				return true
-			}
-		}
-		iter.ReportError("read map key", "unexpected map key type "+keyType.String())
-		return true
-	})
-}
-
-type mapEncoder struct {
-	mapType      reflect.Type
-	elemType     reflect.Type
-	elemEncoder  ValEncoder
-	mapInterface emptyInterface
-}
-
-func (encoder *mapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-	stream.WriteObjectStart()
-	for i, key := range realVal.MapKeys() {
-		if i != 0 {
-			stream.WriteMore()
-		}
-		encodeMapKey(key, stream)
-		if stream.indention > 0 {
-			stream.writeTwoBytes(byte(':'), byte(' '))
-		} else {
-			stream.writeByte(':')
-		}
-		val := realVal.MapIndex(key).Interface()
-		encoder.elemEncoder.EncodeInterface(val, stream)
-	}
-	stream.WriteObjectEnd()
-}
-
-func encodeMapKey(key reflect.Value, stream *Stream) {
-	if key.Kind() == reflect.String {
-		stream.WriteString(key.String())
-		return
-	}
-	if tm, ok := key.Interface().(encoding.TextMarshaler); ok {
-		buf, err := tm.MarshalText()
-		if err != nil {
-			stream.Error = err
-			return
-		}
-		stream.writeByte('"')
-		stream.Write(buf)
-		stream.writeByte('"')
-		return
-	}
-	switch key.Kind() {
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		stream.writeByte('"')
-		stream.WriteInt64(key.Int())
-		stream.writeByte('"')
-		return
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		stream.writeByte('"')
-		stream.WriteUint64(key.Uint())
-		stream.writeByte('"')
-		return
-	}
-	stream.Error = &json.UnsupportedTypeError{Type: key.Type()}
-}
-
-func (encoder *mapEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *mapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-	return realVal.Len() == 0
-}
-
-type sortKeysMapEncoder struct {
-	mapType      reflect.Type
-	elemType     reflect.Type
-	elemEncoder  ValEncoder
-	mapInterface emptyInterface
-}
-
-func (encoder *sortKeysMapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-
-	// Extract and sort the keys.
-	keys := realVal.MapKeys()
-	sv := stringValues(make([]reflectWithString, len(keys)))
-	for i, v := range keys {
-		sv[i].v = v
-		if err := sv[i].resolve(); err != nil {
-			stream.Error = err
-			return
-		}
-	}
-	sort.Sort(sv)
-
-	stream.WriteObjectStart()
-	for i, key := range sv {
-		if i != 0 {
-			stream.WriteMore()
-		}
-		stream.WriteVal(key.s) // might need html escape, so can not WriteString directly
-		if stream.indention > 0 {
-			stream.writeTwoBytes(byte(':'), byte(' '))
-		} else {
-			stream.writeByte(':')
-		}
-		val := realVal.MapIndex(key.v).Interface()
-		encoder.elemEncoder.EncodeInterface(val, stream)
-	}
-	stream.WriteObjectEnd()
-}
-
-// stringValues is a slice of reflect.Value holding *reflect.StringValue.
-// It implements the methods to sort by string.
-type stringValues []reflectWithString
-
-type reflectWithString struct {
-	v reflect.Value
-	s string
-}
-
-func (w *reflectWithString) resolve() error {
-	if w.v.Kind() == reflect.String {
-		w.s = w.v.String()
-		return nil
-	}
-	if tm, ok := w.v.Interface().(encoding.TextMarshaler); ok {
-		buf, err := tm.MarshalText()
-		w.s = string(buf)
-		return err
-	}
-	switch w.v.Kind() {
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		w.s = strconv.FormatInt(w.v.Int(), 10)
-		return nil
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		w.s = strconv.FormatUint(w.v.Uint(), 10)
-		return nil
-	}
-	return &json.UnsupportedTypeError{Type: w.v.Type()}
-}
-
-func (sv stringValues) Len() int           { return len(sv) }
-func (sv stringValues) Swap(i, j int)      { sv[i], sv[j] = sv[j], sv[i] }
-func (sv stringValues) Less(i, j int) bool { return sv[i].s < sv[j].s }
-
-func (encoder *sortKeysMapEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *sortKeysMapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	mapInterface := encoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface)
-	return realVal.Len() == 0
-}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_native.go b/vendor/github.com/json-iterator/go/feature_reflect_native.go
deleted file mode 100644
index b37dab3d8..000000000
--- a/vendor/github.com/json-iterator/go/feature_reflect_native.go
+++ /dev/null
@@ -1,672 +0,0 @@
-package jsoniter
-
-import (
-	"encoding"
-	"encoding/base64"
-	"encoding/json"
-	"unsafe"
-)
-
-type stringCodec struct {
-}
-
-func (codec *stringCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*string)(ptr)) = iter.ReadString()
-}
-
-func (codec *stringCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	str := *((*string)(ptr))
-	stream.WriteString(str)
-}
-
-func (codec *stringCodec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *stringCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*string)(ptr)) == ""
-}
-
-type intCodec struct {
-}
-
-func (codec *intCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int)(ptr)) = iter.ReadInt()
-}
-
-func (codec *intCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteInt(*((*int)(ptr)))
-}
-
-func (codec *intCodec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *intCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*int)(ptr)) == 0
-}
-
-type uintptrCodec struct {
-}
-
-func (codec *uintptrCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uintptr)(ptr)) = uintptr(iter.ReadUint64())
-}
-
-func (codec *uintptrCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint64(uint64(*((*uintptr)(ptr))))
-}
-
-func (codec *uintptrCodec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uintptrCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uintptr)(ptr)) == 0
-}
-
-type int8Codec struct {
-}
-
-func (codec *int8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int8)(ptr)) = iter.ReadInt8()
-}
-
-func (codec *int8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteInt8(*((*int8)(ptr)))
-}
-
-func (codec *int8Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *int8Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*int8)(ptr)) == 0
-}
-
-type int16Codec struct {
-}
-
-func (codec *int16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int16)(ptr)) = iter.ReadInt16()
-}
-
-func (codec *int16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteInt16(*((*int16)(ptr)))
-}
-
-func (codec *int16Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *int16Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*int16)(ptr)) == 0
-}
-
-type int32Codec struct {
-}
-
-func (codec *int32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int32)(ptr)) = iter.ReadInt32()
-}
-
-func (codec *int32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteInt32(*((*int32)(ptr)))
-}
-
-func (codec *int32Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *int32Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*int32)(ptr)) == 0
-}
-
-type int64Codec struct {
-}
-
-func (codec *int64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int64)(ptr)) = iter.ReadInt64()
-}
-
-func (codec *int64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteInt64(*((*int64)(ptr)))
-}
-
-func (codec *int64Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *int64Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*int64)(ptr)) == 0
-}
-
-type uintCodec struct {
-}
-
-func (codec *uintCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint)(ptr)) = iter.ReadUint()
-}
-
-func (codec *uintCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint(*((*uint)(ptr)))
-}
-
-func (codec *uintCodec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uintCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uint)(ptr)) == 0
-}
-
-type uint8Codec struct {
-}
-
-func (codec *uint8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint8)(ptr)) = iter.ReadUint8()
-}
-
-func (codec *uint8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint8(*((*uint8)(ptr)))
-}
-
-func (codec *uint8Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uint8Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uint8)(ptr)) == 0
-}
-
-type uint16Codec struct {
-}
-
-func (codec *uint16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint16)(ptr)) = iter.ReadUint16()
-}
-
-func (codec *uint16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint16(*((*uint16)(ptr)))
-}
-
-func (codec *uint16Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uint16Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uint16)(ptr)) == 0
-}
-
-type uint32Codec struct {
-}
-
-func (codec *uint32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint32)(ptr)) = iter.ReadUint32()
-}
-
-func (codec *uint32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint32(*((*uint32)(ptr)))
-}
-
-func (codec *uint32Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uint32Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uint32)(ptr)) == 0
-}
-
-type uint64Codec struct {
-}
-
-func (codec *uint64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint64)(ptr)) = iter.ReadUint64()
-}
-
-func (codec *uint64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteUint64(*((*uint64)(ptr)))
-}
-
-func (codec *uint64Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *uint64Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*uint64)(ptr)) == 0
-}
-
-type float32Codec struct {
-}
-
-func (codec *float32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*float32)(ptr)) = iter.ReadFloat32()
-}
-
-func (codec *float32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteFloat32(*((*float32)(ptr)))
-}
-
-func (codec *float32Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *float32Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*float32)(ptr)) == 0
-}
-
-type float64Codec struct {
-}
-
-func (codec *float64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*float64)(ptr)) = iter.ReadFloat64()
-}
-
-func (codec *float64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteFloat64(*((*float64)(ptr)))
-}
-
-func (codec *float64Codec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *float64Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return *((*float64)(ptr)) == 0
-}
-
-type boolCodec struct {
-}
-
-func (codec *boolCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*bool)(ptr)) = iter.ReadBool()
-}
-
-func (codec *boolCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteBool(*((*bool)(ptr)))
-}
-
-func (codec *boolCodec) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, codec)
-}
-
-func (codec *boolCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return !(*((*bool)(ptr)))
-}
-
-type emptyInterfaceCodec struct {
-}
-
-func (codec *emptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*interface{})(ptr)) = iter.Read()
-}
-
-func (codec *emptyInterfaceCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteVal(*((*interface{})(ptr)))
-}
-
-func (codec *emptyInterfaceCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteVal(val)
-}
-
-func (codec *emptyInterfaceCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return ptr == nil
-}
-
-type nonEmptyInterfaceCodec struct {
-}
-
-func (codec *nonEmptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	nonEmptyInterface := (*nonEmptyInterface)(ptr)
-	if nonEmptyInterface.itab == nil {
-		iter.ReportError("read non-empty interface", "do not know which concrete type to decode to")
-		return
-	}
-	var i interface{}
-	e := (*emptyInterface)(unsafe.Pointer(&i))
-	e.typ = nonEmptyInterface.itab.typ
-	e.word = nonEmptyInterface.word
-	iter.ReadVal(&i)
-	nonEmptyInterface.word = e.word
-}
-
-func (codec *nonEmptyInterfaceCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	nonEmptyInterface := (*nonEmptyInterface)(ptr)
-	var i interface{}
-	e := (*emptyInterface)(unsafe.Pointer(&i))
-	e.typ = nonEmptyInterface.itab.typ
-	e.word = nonEmptyInterface.word
-	stream.WriteVal(i)
-}
-
-func (codec *nonEmptyInterfaceCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteVal(val)
-}
-
-func (codec *nonEmptyInterfaceCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	nonEmptyInterface := (*nonEmptyInterface)(ptr)
-	return nonEmptyInterface.word == nil
-}
-
-type anyCodec struct {
-}
-
-func (codec *anyCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*Any)(ptr)) = iter.ReadAny()
-}
-
-func (codec *anyCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	(*((*Any)(ptr))).WriteTo(stream)
-}
-
-func (codec *anyCodec) EncodeInterface(val interface{}, stream *Stream) {
-	(val.(Any)).WriteTo(stream)
-}
-
-func (codec *anyCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return (*((*Any)(ptr))).Size() == 0
-}
-
-type jsonNumberCodec struct {
-}
-
-func (codec *jsonNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
-}
-
-func (codec *jsonNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*json.Number)(ptr))))
-}
-
-func (codec *jsonNumberCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(json.Number)))
-}
-
-func (codec *jsonNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return len(*((*json.Number)(ptr))) == 0
-}
-
-type jsoniterNumberCodec struct {
-}
-
-func (codec *jsoniterNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
-}
-
-func (codec *jsoniterNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*Number)(ptr))))
-}
-
-func (codec *jsoniterNumberCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(Number)))
-}
-
-func (codec *jsoniterNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return len(*((*Number)(ptr))) == 0
-}
-
-type jsonRawMessageCodec struct {
-}
-
-func (codec *jsonRawMessageCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*json.RawMessage)(ptr)) = json.RawMessage(iter.SkipAndReturnBytes())
-}
-
-func (codec *jsonRawMessageCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*json.RawMessage)(ptr))))
-}
-
-func (codec *jsonRawMessageCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(json.RawMessage)))
-}
-
-func (codec *jsonRawMessageCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return len(*((*json.RawMessage)(ptr))) == 0
-}
-
-type jsoniterRawMessageCodec struct {
-}
-
-func (codec *jsoniterRawMessageCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*RawMessage)(ptr)) = RawMessage(iter.SkipAndReturnBytes())
-}
-
-func (codec *jsoniterRawMessageCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*RawMessage)(ptr))))
-}
-
-func (codec *jsoniterRawMessageCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(RawMessage)))
-}
-
-func (codec *jsoniterRawMessageCodec) IsEmpty(ptr unsafe.Pointer) bool {
-	return len(*((*RawMessage)(ptr))) == 0
-}
-
-type base64Codec struct {
-	sliceDecoder ValDecoder
-}
-
-func (codec *base64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		ptrSlice := (*sliceHeader)(ptr)
-		ptrSlice.Len = 0
-		ptrSlice.Cap = 0
-		ptrSlice.Data = nil
-		return
-	}
-	switch iter.WhatIsNext() {
-	case StringValue:
-		encoding := base64.StdEncoding
-		src := iter.SkipAndReturnBytes()
-		src = src[1 : len(src)-1]
-		decodedLen := encoding.DecodedLen(len(src))
-		dst := make([]byte, decodedLen)
-		len, err := encoding.Decode(dst, src)
-		if err != nil {
-			iter.ReportError("decode base64", err.Error())
-		} else {
-			dst = dst[:len]
-			dstSlice := (*sliceHeader)(unsafe.Pointer(&dst))
-			ptrSlice := (*sliceHeader)(ptr)
-			ptrSlice.Data = dstSlice.Data
-			ptrSlice.Cap = dstSlice.Cap
-			ptrSlice.Len = dstSlice.Len
-		}
-	case ArrayValue:
-		codec.sliceDecoder.Decode(ptr, iter)
-	default:
-		iter.ReportError("base64Codec", "invalid input")
-	}
-}
-
-func (codec *base64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	src := *((*[]byte)(ptr))
-	if len(src) == 0 {
-		stream.WriteNil()
-		return
-	}
-	encoding := base64.StdEncoding
-	stream.writeByte('"')
-	toGrow := encoding.EncodedLen(len(src))
-	stream.ensure(toGrow)
-	encoding.Encode(stream.buf[stream.n:], src)
-	stream.n += toGrow
-	stream.writeByte('"')
-}
-
-func (codec *base64Codec) EncodeInterface(val interface{}, stream *Stream) {
-	ptr := extractInterface(val).word
-	src := *((*[]byte)(ptr))
-	if len(src) == 0 {
-		stream.WriteNil()
-		return
-	}
-	encoding := base64.StdEncoding
-	stream.writeByte('"')
-	toGrow := encoding.EncodedLen(len(src))
-	stream.ensure(toGrow)
-	encoding.Encode(stream.buf[stream.n:], src)
-	stream.n += toGrow
-	stream.writeByte('"')
-}
-
-func (codec *base64Codec) IsEmpty(ptr unsafe.Pointer) bool {
-	return len(*((*[]byte)(ptr))) == 0
-}
-
-type stringModeNumberDecoder struct {
-	elemDecoder ValDecoder
-}
-
-func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	c := iter.nextToken()
-	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
-		return
-	}
-	decoder.elemDecoder.Decode(ptr, iter)
-	if iter.Error != nil {
-		return
-	}
-	c = iter.readByte()
-	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
-		return
-	}
-}
-
-type stringModeStringDecoder struct {
-	elemDecoder ValDecoder
-	cfg         *frozenConfig
-}
-
-func (decoder *stringModeStringDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	decoder.elemDecoder.Decode(ptr, iter)
-	str := *((*string)(ptr))
-	tempIter := decoder.cfg.BorrowIterator([]byte(str))
-	defer decoder.cfg.ReturnIterator(tempIter)
-	*((*string)(ptr)) = tempIter.ReadString()
-}
-
-type stringModeNumberEncoder struct {
-	elemEncoder ValEncoder
-}
-
-func (encoder *stringModeNumberEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.writeByte('"')
-	encoder.elemEncoder.Encode(ptr, stream)
-	stream.writeByte('"')
-}
-
-func (encoder *stringModeNumberEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *stringModeNumberEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return encoder.elemEncoder.IsEmpty(ptr)
-}
-
-type stringModeStringEncoder struct {
-	elemEncoder ValEncoder
-	cfg         *frozenConfig
-}
-
-func (encoder *stringModeStringEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	tempStream := encoder.cfg.BorrowStream(nil)
-	defer encoder.cfg.ReturnStream(tempStream)
-	encoder.elemEncoder.Encode(ptr, tempStream)
-	stream.WriteString(string(tempStream.Buffer()))
-}
-
-func (encoder *stringModeStringEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *stringModeStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return encoder.elemEncoder.IsEmpty(ptr)
-}
-
-type marshalerEncoder struct {
-	templateInterface emptyInterface
-	checkIsEmpty      checkIsEmpty
-}
-
-func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	templateInterface := encoder.templateInterface
-	templateInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	marshaler := (*realInterface).(json.Marshaler)
-	bytes, err := marshaler.MarshalJSON()
-	if err != nil {
-		stream.Error = err
-	} else {
-		stream.Write(bytes)
-	}
-}
-func (encoder *marshalerEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *marshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return encoder.checkIsEmpty.IsEmpty(ptr)
-}
-
-type textMarshalerEncoder struct {
-	templateInterface emptyInterface
-	checkIsEmpty      checkIsEmpty
-}
-
-func (encoder *textMarshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	templateInterface := encoder.templateInterface
-	templateInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	marshaler := (*realInterface).(encoding.TextMarshaler)
-	bytes, err := marshaler.MarshalText()
-	if err != nil {
-		stream.Error = err
-	} else {
-		stream.WriteString(string(bytes))
-	}
-}
-
-func (encoder *textMarshalerEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *textMarshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	return encoder.checkIsEmpty.IsEmpty(ptr)
-}
-
-type unmarshalerDecoder struct {
-	templateInterface emptyInterface
-}
-
-func (decoder *unmarshalerDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	templateInterface := decoder.templateInterface
-	templateInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	unmarshaler := (*realInterface).(json.Unmarshaler)
-	iter.nextToken()
-	iter.unreadByte() // skip spaces
-	bytes := iter.SkipAndReturnBytes()
-	err := unmarshaler.UnmarshalJSON(bytes)
-	if err != nil {
-		iter.ReportError("unmarshalerDecoder", err.Error())
-	}
-}
-
-type textUnmarshalerDecoder struct {
-	templateInterface emptyInterface
-}
-
-func (decoder *textUnmarshalerDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	templateInterface := decoder.templateInterface
-	templateInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	unmarshaler := (*realInterface).(encoding.TextUnmarshaler)
-	str := iter.ReadString()
-	err := unmarshaler.UnmarshalText([]byte(str))
-	if err != nil {
-		iter.ReportError("textUnmarshalerDecoder", err.Error())
-	}
-}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_slice.go b/vendor/github.com/json-iterator/go/feature_reflect_slice.go
deleted file mode 100644
index 7377eec7b..000000000
--- a/vendor/github.com/json-iterator/go/feature_reflect_slice.go
+++ /dev/null
@@ -1,149 +0,0 @@
-package jsoniter
-
-import (
-	"fmt"
-	"io"
-	"reflect"
-	"unsafe"
-)
-
-func decoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	decoder, err := decoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	return &sliceDecoder{typ, typ.Elem(), decoder}, nil
-}
-
-func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	encoder, err := encoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
-	}
-	return &sliceEncoder{typ, typ.Elem(), encoder}, nil
-}
-
-type sliceEncoder struct {
-	sliceType   reflect.Type
-	elemType    reflect.Type
-	elemEncoder ValEncoder
-}
-
-func (encoder *sliceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	slice := (*sliceHeader)(ptr)
-	if slice.Data == nil {
-		stream.WriteNil()
-		return
-	}
-	if slice.Len == 0 {
-		stream.WriteEmptyArray()
-		return
-	}
-	stream.WriteArrayStart()
-	elemPtr := unsafe.Pointer(slice.Data)
-	encoder.elemEncoder.Encode(unsafe.Pointer(elemPtr), stream)
-	for i := 1; i < slice.Len; i++ {
-		stream.WriteMore()
-		elemPtr = unsafe.Pointer(uintptr(elemPtr) + encoder.elemType.Size())
-		encoder.elemEncoder.Encode(unsafe.Pointer(elemPtr), stream)
-	}
-	stream.WriteArrayEnd()
-	if stream.Error != nil && stream.Error != io.EOF {
-		stream.Error = fmt.Errorf("%v: %s", encoder.sliceType, stream.Error.Error())
-	}
-}
-
-func (encoder *sliceEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
-func (encoder *sliceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	slice := (*sliceHeader)(ptr)
-	return slice.Len == 0
-}
-
-type sliceDecoder struct {
-	sliceType   reflect.Type
-	elemType    reflect.Type
-	elemDecoder ValDecoder
-}
-
-// sliceHeader is a safe version of SliceHeader used within this package.
-type sliceHeader struct {
-	Data unsafe.Pointer
-	Len  int
-	Cap  int
-}
-
-func (decoder *sliceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	decoder.doDecode(ptr, iter)
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error())
-	}
-}
-
-func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
-	slice := (*sliceHeader)(ptr)
-	if iter.ReadNil() {
-		slice.Len = 0
-		slice.Cap = 0
-		slice.Data = nil
-		return
-	}
-	reuseSlice(slice, decoder.sliceType, 4)
-	slice.Len = 0
-	offset := uintptr(0)
-	iter.ReadArrayCB(func(iter *Iterator) bool {
-		growOne(slice, decoder.sliceType, decoder.elemType)
-		decoder.elemDecoder.Decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
-		offset += decoder.elemType.Size()
-		return true
-	})
-}
-
-// grow grows the slice s so that it can hold extra more values, allocating
-// more capacity if needed. It also returns the old and new slice lengths.
-func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Type) {
-	newLen := slice.Len + 1
-	if newLen <= slice.Cap {
-		slice.Len = newLen
-		return
-	}
-	newCap := slice.Cap
-	if newCap == 0 {
-		newCap = 1
-	} else {
-		for newCap < newLen {
-			if slice.Len < 1024 {
-				newCap += newCap
-			} else {
-				newCap += newCap / 4
-			}
-		}
-	}
-	newVal := reflect.MakeSlice(sliceType, newLen, newCap)
-	dst := unsafe.Pointer(newVal.Pointer())
-	// copy old array into new array
-	originalBytesCount := uintptr(slice.Len) * elementType.Size()
-	srcPtr := (*[1 << 30]byte)(slice.Data)
-	dstPtr := (*[1 << 30]byte)(dst)
-	for i := uintptr(0); i < originalBytesCount; i++ {
-		dstPtr[i] = srcPtr[i]
-	}
-	slice.Data = dst
-	slice.Len = newLen
-	slice.Cap = newCap
-}
-
-func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) {
-	if expectedCap <= slice.Cap {
-		return
-	}
-	newVal := reflect.MakeSlice(sliceType, 0, expectedCap)
-	dst := unsafe.Pointer(newVal.Pointer())
-	slice.Data = dst
-	slice.Cap = expectedCap
-}
diff --git a/vendor/github.com/json-iterator/go/feature_stream_int.go b/vendor/github.com/json-iterator/go/feature_stream_int.go
deleted file mode 100644
index 7cfd522c1..000000000
--- a/vendor/github.com/json-iterator/go/feature_stream_int.go
+++ /dev/null
@@ -1,320 +0,0 @@
-package jsoniter
-
-var digits []uint32
-
-func init() {
-	digits = make([]uint32, 1000)
-	for i := uint32(0); i < 1000; i++ {
-		digits[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i%10 + '0'
-		if i < 10 {
-			digits[i] += 2 << 24
-		} else if i < 100 {
-			digits[i] += 1 << 24
-		}
-	}
-}
-
-func writeFirstBuf(buf []byte, v uint32, n int) int {
-	start := v >> 24
-	if start == 0 {
-		buf[n] = byte(v >> 16)
-		n++
-		buf[n] = byte(v >> 8)
-		n++
-	} else if start == 1 {
-		buf[n] = byte(v >> 8)
-		n++
-	}
-	buf[n] = byte(v)
-	n++
-	return n
-}
-
-func writeBuf(buf []byte, v uint32, n int) {
-	buf[n] = byte(v >> 16)
-	buf[n+1] = byte(v >> 8)
-	buf[n+2] = byte(v)
-}
-
-// WriteUint8 write uint8 to stream
-func (stream *Stream) WriteUint8(val uint8) {
-	stream.ensure(3)
-	stream.n = writeFirstBuf(stream.buf, digits[val], stream.n)
-}
-
-// WriteInt8 write int8 to stream
-func (stream *Stream) WriteInt8(nval int8) {
-	stream.ensure(4)
-	n := stream.n
-	var val uint8
-	if nval < 0 {
-		val = uint8(-nval)
-		stream.buf[n] = '-'
-		n++
-	} else {
-		val = uint8(nval)
-	}
-	stream.n = writeFirstBuf(stream.buf, digits[val], n)
-}
-
-// WriteUint16 write uint16 to stream
-func (stream *Stream) WriteUint16(val uint16) {
-	stream.ensure(5)
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], stream.n)
-		return
-	}
-	r1 := val - q1*1000
-	n := writeFirstBuf(stream.buf, digits[q1], stream.n)
-	writeBuf(stream.buf, digits[r1], n)
-	stream.n = n + 3
-	return
-}
-
-// WriteInt16 write int16 to stream
-func (stream *Stream) WriteInt16(nval int16) {
-	stream.ensure(6)
-	n := stream.n
-	var val uint16
-	if nval < 0 {
-		val = uint16(-nval)
-		stream.buf[n] = '-'
-		n++
-	} else {
-		val = uint16(nval)
-	}
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], n)
-		return
-	}
-	r1 := val - q1*1000
-	n = writeFirstBuf(stream.buf, digits[q1], n)
-	writeBuf(stream.buf, digits[r1], n)
-	stream.n = n + 3
-	return
-}
-
-// WriteUint32 write uint32 to stream
-func (stream *Stream) WriteUint32(val uint32) {
-	stream.ensure(10)
-	n := stream.n
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], n)
-		return
-	}
-	r1 := val - q1*1000
-	q2 := q1 / 1000
-	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, digits[q1], n)
-		writeBuf(stream.buf, digits[r1], n)
-		stream.n = n + 3
-		return
-	}
-	r2 := q1 - q2*1000
-	q3 := q2 / 1000
-	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q2], n)
-	} else {
-		r3 := q2 - q3*1000
-		stream.buf[n] = byte(q3 + '0')
-		n++
-		writeBuf(stream.buf, digits[r3], n)
-		n += 3
-	}
-	writeBuf(stream.buf, digits[r2], n)
-	writeBuf(stream.buf, digits[r1], n+3)
-	stream.n = n + 6
-}
-
-// WriteInt32 write int32 to stream
-func (stream *Stream) WriteInt32(nval int32) {
-	stream.ensure(11)
-	n := stream.n
-	var val uint32
-	if nval < 0 {
-		val = uint32(-nval)
-		stream.buf[n] = '-'
-		n++
-	} else {
-		val = uint32(nval)
-	}
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], n)
-		return
-	}
-	r1 := val - q1*1000
-	q2 := q1 / 1000
-	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, digits[q1], n)
-		writeBuf(stream.buf, digits[r1], n)
-		stream.n = n + 3
-		return
-	}
-	r2 := q1 - q2*1000
-	q3 := q2 / 1000
-	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q2], n)
-	} else {
-		r3 := q2 - q3*1000
-		stream.buf[n] = byte(q3 + '0')
-		n++
-		writeBuf(stream.buf, digits[r3], n)
-		n += 3
-	}
-	writeBuf(stream.buf, digits[r2], n)
-	writeBuf(stream.buf, digits[r1], n+3)
-	stream.n = n + 6
-}
-
-// WriteUint64 write uint64 to stream
-func (stream *Stream) WriteUint64(val uint64) {
-	stream.ensure(20)
-	n := stream.n
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], n)
-		return
-	}
-	r1 := val - q1*1000
-	q2 := q1 / 1000
-	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, digits[q1], n)
-		writeBuf(stream.buf, digits[r1], n)
-		stream.n = n + 3
-		return
-	}
-	r2 := q1 - q2*1000
-	q3 := q2 / 1000
-	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q2], n)
-		writeBuf(stream.buf, digits[r2], n)
-		writeBuf(stream.buf, digits[r1], n+3)
-		stream.n = n + 6
-		return
-	}
-	r3 := q2 - q3*1000
-	q4 := q3 / 1000
-	if q4 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q3], n)
-		writeBuf(stream.buf, digits[r3], n)
-		writeBuf(stream.buf, digits[r2], n+3)
-		writeBuf(stream.buf, digits[r1], n+6)
-		stream.n = n + 9
-		return
-	}
-	r4 := q3 - q4*1000
-	q5 := q4 / 1000
-	if q5 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q4], n)
-		writeBuf(stream.buf, digits[r4], n)
-		writeBuf(stream.buf, digits[r3], n+3)
-		writeBuf(stream.buf, digits[r2], n+6)
-		writeBuf(stream.buf, digits[r1], n+9)
-		stream.n = n + 12
-		return
-	}
-	r5 := q4 - q5*1000
-	q6 := q5 / 1000
-	if q6 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q5], n)
-	} else {
-		n = writeFirstBuf(stream.buf, digits[q6], n)
-		r6 := q5 - q6*1000
-		writeBuf(stream.buf, digits[r6], n)
-		n += 3
-	}
-	writeBuf(stream.buf, digits[r5], n)
-	writeBuf(stream.buf, digits[r4], n+3)
-	writeBuf(stream.buf, digits[r3], n+6)
-	writeBuf(stream.buf, digits[r2], n+9)
-	writeBuf(stream.buf, digits[r1], n+12)
-	stream.n = n + 15
-}
-
-// WriteInt64 write int64 to stream
-func (stream *Stream) WriteInt64(nval int64) {
-	stream.ensure(20)
-	n := stream.n
-	var val uint64
-	if nval < 0 {
-		val = uint64(-nval)
-		stream.buf[n] = '-'
-		n++
-	} else {
-		val = uint64(nval)
-	}
-	q1 := val / 1000
-	if q1 == 0 {
-		stream.n = writeFirstBuf(stream.buf, digits[val], n)
-		return
-	}
-	r1 := val - q1*1000
-	q2 := q1 / 1000
-	if q2 == 0 {
-		n := writeFirstBuf(stream.buf, digits[q1], n)
-		writeBuf(stream.buf, digits[r1], n)
-		stream.n = n + 3
-		return
-	}
-	r2 := q1 - q2*1000
-	q3 := q2 / 1000
-	if q3 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q2], n)
-		writeBuf(stream.buf, digits[r2], n)
-		writeBuf(stream.buf, digits[r1], n+3)
-		stream.n = n + 6
-		return
-	}
-	r3 := q2 - q3*1000
-	q4 := q3 / 1000
-	if q4 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q3], n)
-		writeBuf(stream.buf, digits[r3], n)
-		writeBuf(stream.buf, digits[r2], n+3)
-		writeBuf(stream.buf, digits[r1], n+6)
-		stream.n = n + 9
-		return
-	}
-	r4 := q3 - q4*1000
-	q5 := q4 / 1000
-	if q5 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q4], n)
-		writeBuf(stream.buf, digits[r4], n)
-		writeBuf(stream.buf, digits[r3], n+3)
-		writeBuf(stream.buf, digits[r2], n+6)
-		writeBuf(stream.buf, digits[r1], n+9)
-		stream.n = n + 12
-		return
-	}
-	r5 := q4 - q5*1000
-	q6 := q5 / 1000
-	if q6 == 0 {
-		n = writeFirstBuf(stream.buf, digits[q5], n)
-	} else {
-		stream.buf[n] = byte(q6 + '0')
-		n++
-		r6 := q5 - q6*1000
-		writeBuf(stream.buf, digits[r6], n)
-		n += 3
-	}
-	writeBuf(stream.buf, digits[r5], n)
-	writeBuf(stream.buf, digits[r4], n+3)
-	writeBuf(stream.buf, digits[r3], n+6)
-	writeBuf(stream.buf, digits[r2], n+9)
-	writeBuf(stream.buf, digits[r1], n+12)
-	stream.n = n + 15
-}
-
-// WriteInt write int to stream
-func (stream *Stream) WriteInt(val int) {
-	stream.WriteInt64(int64(val))
-}
-
-// WriteUint write uint to stream
-func (stream *Stream) WriteUint(val uint) {
-	stream.WriteUint64(uint64(val))
-}
diff --git a/vendor/github.com/json-iterator/go/feature_iter.go b/vendor/github.com/json-iterator/go/iter.go
index 4357d69ba..95ae54fbf 100644
--- a/vendor/github.com/json-iterator/go/feature_iter.go
+++ b/vendor/github.com/json-iterator/go/iter.go
@@ -77,6 +77,7 @@ type Iterator struct {
 	captureStartedAt int
 	captured         []byte
 	Error            error
+	Attachment       interface{} // open for customized decoder
 }
 
 // NewIterator creates an empty Iterator instance
@@ -167,7 +168,7 @@ func (iter *Iterator) isObjectEnd() bool {
 	if c == '}' {
 		return true
 	}
-	iter.ReportError("isObjectEnd", "object ended prematurely")
+	iter.ReportError("isObjectEnd", "object ended prematurely, unexpected char "+string([]byte{c}))
 	return true
 }
 
@@ -200,8 +201,22 @@ func (iter *Iterator) ReportError(operation string, msg string) {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	iter.Error = fmt.Errorf("%s: %s, parsing %v ...%s... at %s", operation, msg, iter.head,
-		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
+	peekEnd := iter.head + 10
+	if peekEnd > iter.tail {
+		peekEnd = iter.tail
+	}
+	parsing := string(iter.buf[peekStart:peekEnd])
+	contextStart := iter.head - 50
+	if contextStart < 0 {
+		contextStart = 0
+	}
+	contextEnd := iter.head + 50
+	if contextEnd > iter.tail {
+		contextEnd = iter.tail
+	}
+	context := string(iter.buf[contextStart:contextEnd])
+	iter.Error = fmt.Errorf("%s: %s, error found in #%v byte of ...|%s|..., bigger context ...|%s|...",
+		operation, msg, iter.head-peekStart, parsing, context)
 }
 
 // CurrentBuffer gets current buffer as string for debugging purpose
@@ -210,7 +225,7 @@ func (iter *Iterator) CurrentBuffer() string {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
+	return fmt.Sprintf("parsing #%v byte, around ...|%s|..., whole buffer ...|%s|...", iter.head,
 		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
 }
 
diff --git a/vendor/github.com/json-iterator/go/feature_iter_array.go b/vendor/github.com/json-iterator/go/iter_array.go
index cbc3ec8d1..6188cb457 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_array.go
+++ b/vendor/github.com/json-iterator/go/iter_array.go
@@ -19,7 +19,7 @@ func (iter *Iterator) ReadArray() (ret bool) {
 	case ',':
 		return true
 	default:
-		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found: "+string([]byte{c}))
+		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found "+string([]byte{c}))
 		return
 	}
 }
@@ -42,7 +42,7 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 				c = iter.nextToken()
 			}
 			if c != ']' {
-				iter.ReportError("ReadArrayCB", "expect ] in the end")
+				iter.ReportError("ReadArrayCB", "expect ] in the end, but found "+string([]byte{c}))
 				return false
 			}
 			return true
@@ -53,6 +53,6 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadArrayCB", "expect [ or n, but found: "+string([]byte{c}))
+	iter.ReportError("ReadArrayCB", "expect [ or n, but found "+string([]byte{c}))
 	return false
 }
diff --git a/vendor/github.com/json-iterator/go/feature_iter_float.go b/vendor/github.com/json-iterator/go/iter_float.go
index 86f459912..4f883c095 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_float.go
+++ b/vendor/github.com/json-iterator/go/iter_float.go
@@ -1,6 +1,7 @@
 package jsoniter
 
 import (
+	"encoding/json"
 	"io"
 	"math/big"
 	"strconv"
@@ -339,3 +340,8 @@ func validateFloat(str string) string {
 	}
 	return ""
 }
+
+// ReadNumber read json.Number
+func (iter *Iterator) ReadNumber() (ret json.Number) {
+	return json.Number(iter.readNumberAsString())
+}
diff --git a/vendor/github.com/json-iterator/go/feature_iter_int.go b/vendor/github.com/json-iterator/go/iter_int.go
index 886879efd..214232035 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_int.go
+++ b/vendor/github.com/json-iterator/go/iter_int.go
@@ -22,11 +22,17 @@ func init() {
 
 // ReadUint read uint
 func (iter *Iterator) ReadUint() uint {
+	if strconv.IntSize == 32 {
+		return uint(iter.ReadUint32())
+	}
 	return uint(iter.ReadUint64())
 }
 
 // ReadInt read int
 func (iter *Iterator) ReadInt() int {
+	if strconv.IntSize == 32 {
+		return int(iter.ReadInt32())
+	}
 	return int(iter.ReadInt64())
 }
 
@@ -115,6 +121,7 @@ func (iter *Iterator) ReadUint32() (ret uint32) {
 func (iter *Iterator) readUint32(c byte) (ret uint32) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -127,12 +134,14 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind2 := intDigits[iter.buf[i]]
 		if ind2 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value
 		}
 		i++
 		ind3 := intDigits[iter.buf[i]]
 		if ind3 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*10 + uint32(ind2)
 		}
 		//iter.head = i + 1
@@ -141,30 +150,35 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind4 := intDigits[iter.buf[i]]
 		if ind4 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*100 + uint32(ind2)*10 + uint32(ind3)
 		}
 		i++
 		ind5 := intDigits[iter.buf[i]]
 		if ind5 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*1000 + uint32(ind2)*100 + uint32(ind3)*10 + uint32(ind4)
 		}
 		i++
 		ind6 := intDigits[iter.buf[i]]
 		if ind6 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*10000 + uint32(ind2)*1000 + uint32(ind3)*100 + uint32(ind4)*10 + uint32(ind5)
 		}
 		i++
 		ind7 := intDigits[iter.buf[i]]
 		if ind7 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*100000 + uint32(ind2)*10000 + uint32(ind3)*1000 + uint32(ind4)*100 + uint32(ind5)*10 + uint32(ind6)
 		}
 		i++
 		ind8 := intDigits[iter.buf[i]]
 		if ind8 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*1000000 + uint32(ind2)*100000 + uint32(ind3)*10000 + uint32(ind4)*1000 + uint32(ind5)*100 + uint32(ind6)*10 + uint32(ind7)
 		}
 		i++
@@ -172,6 +186,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		value = value*10000000 + uint32(ind2)*1000000 + uint32(ind3)*100000 + uint32(ind4)*10000 + uint32(ind5)*1000 + uint32(ind6)*100 + uint32(ind7)*10 + uint32(ind8)
 		iter.head = i
 		if ind9 == invalidCharForNumber {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -180,6 +195,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint32SafeToMultiply10 {
@@ -194,6 +210,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			value = (value << 3) + (value << 1) + uint32(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -226,6 +243,7 @@ func (iter *Iterator) ReadUint64() uint64 {
 func (iter *Iterator) readUint64(c byte) (ret uint64) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -233,11 +251,73 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 		return
 	}
 	value := uint64(ind)
+	if iter.tail-iter.head > 10 {
+		i := iter.head
+		ind2 := intDigits[iter.buf[i]]
+		if ind2 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value
+		}
+		i++
+		ind3 := intDigits[iter.buf[i]]
+		if ind3 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10 + uint64(ind2)
+		}
+		//iter.head = i + 1
+		//value = value * 100 + uint32(ind2) * 10 + uint32(ind3)
+		i++
+		ind4 := intDigits[iter.buf[i]]
+		if ind4 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*100 + uint64(ind2)*10 + uint64(ind3)
+		}
+		i++
+		ind5 := intDigits[iter.buf[i]]
+		if ind5 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000 + uint64(ind2)*100 + uint64(ind3)*10 + uint64(ind4)
+		}
+		i++
+		ind6 := intDigits[iter.buf[i]]
+		if ind6 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10000 + uint64(ind2)*1000 + uint64(ind3)*100 + uint64(ind4)*10 + uint64(ind5)
+		}
+		i++
+		ind7 := intDigits[iter.buf[i]]
+		if ind7 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*100000 + uint64(ind2)*10000 + uint64(ind3)*1000 + uint64(ind4)*100 + uint64(ind5)*10 + uint64(ind6)
+		}
+		i++
+		ind8 := intDigits[iter.buf[i]]
+		if ind8 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000000 + uint64(ind2)*100000 + uint64(ind3)*10000 + uint64(ind4)*1000 + uint64(ind5)*100 + uint64(ind6)*10 + uint64(ind7)
+		}
+		i++
+		ind9 := intDigits[iter.buf[i]]
+		value = value*10000000 + uint64(ind2)*1000000 + uint64(ind3)*100000 + uint64(ind4)*10000 + uint64(ind5)*1000 + uint64(ind6)*100 + uint64(ind7)*10 + uint64(ind8)
+		iter.head = i
+		if ind9 == invalidCharForNumber {
+			iter.assertInteger()
+			return value
+		}
+	}
 	for {
 		for i := iter.head; i < iter.tail; i++ {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint64SafeToMultiple10 {
@@ -252,7 +332,14 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 			value = (value << 3) + (value << 1) + uint64(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
 }
+
+func (iter *Iterator) assertInteger() {
+	if iter.head < len(iter.buf) && iter.buf[iter.head] == '.' {
+		iter.ReportError("assertInteger", "can not decode float as int")
+	}
+}
diff --git a/vendor/github.com/json-iterator/go/feature_iter_object.go b/vendor/github.com/json-iterator/go/iter_object.go
index 3bdb5576e..1c5757671 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_object.go
+++ b/vendor/github.com/json-iterator/go/iter_object.go
@@ -2,8 +2,7 @@ package jsoniter
 
 import (
 	"fmt"
-	"unicode"
-	"unsafe"
+	"strings"
 )
 
 // ReadObject read one field from object.
@@ -19,15 +18,25 @@ func (iter *Iterator) ReadObject() (ret string) {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
-			return string(iter.readObjectFieldAsBytes())
+			field := iter.ReadString()
+			c = iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+			return field
 		}
 		if c == '}' {
 			return "" // end of object
 		}
-		iter.ReportError("ReadObject", `expect " after {`)
+		iter.ReportError("ReadObject", `expect " after {, but found `+string([]byte{c}))
 		return
 	case ',':
-		return string(iter.readObjectFieldAsBytes())
+		field := iter.ReadString()
+		c = iter.nextToken()
+		if c != ':' {
+			iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+		}
+		return field
 	case '}':
 		return "" // end of object
 	default:
@@ -36,62 +45,92 @@ func (iter *Iterator) ReadObject() (ret string) {
 	}
 }
 
-func (iter *Iterator) readFieldHash() int32 {
+// CaseInsensitive
+func (iter *Iterator) readFieldHash() int64 {
 	hash := int64(0x811c9dc5)
 	c := iter.nextToken()
-	if c == '"' {
-		for {
-			for i := iter.head; i < iter.tail; i++ {
-				// require ascii string and no escape
-				b := iter.buf[i]
-				if 'A' <= b && b <= 'Z' {
-					b += 'a' - 'A'
-				}
-				if b == '"' {
-					iter.head = i + 1
-					c = iter.nextToken()
-					if c != ':' {
-						iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+	if c != '"' {
+		iter.ReportError("readFieldHash", `expect ", but found `+string([]byte{c}))
+		return 0
+	}
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			// require ascii string and no escape
+			b := iter.buf[i]
+			if b == '\\' {
+				iter.head = i
+				for _, b := range iter.readStringSlowPath() {
+					if 'A' <= b && b <= 'Z' && !iter.cfg.caseSensitive {
+						b += 'a' - 'A'
 					}
-					return int32(hash)
+					hash ^= int64(b)
+					hash *= 0x1000193
+				}
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+					return 0
+				}
+				return hash
+			}
+			if b == '"' {
+				iter.head = i + 1
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+					return 0
 				}
-				hash ^= int64(b)
-				hash *= 0x1000193
+				return hash
 			}
-			if !iter.loadMore() {
-				iter.ReportError("readFieldHash", `incomplete field name`)
-				return 0
+			if 'A' <= b && b <= 'Z' && !iter.cfg.caseSensitive {
+				b += 'a' - 'A'
 			}
+			hash ^= int64(b)
+			hash *= 0x1000193
+		}
+		if !iter.loadMore() {
+			iter.ReportError("readFieldHash", `incomplete field name`)
+			return 0
 		}
 	}
-	iter.ReportError("readFieldHash", `expect ", but found `+string([]byte{c}))
-	return 0
 }
 
-func calcHash(str string) int32 {
+func calcHash(str string, caseSensitive bool) int64 {
+	if !caseSensitive {
+		str = strings.ToLower(str)
+	}
 	hash := int64(0x811c9dc5)
-	for _, b := range str {
-		hash ^= int64(unicode.ToLower(b))
+	for _, b := range []byte(str) {
+		hash ^= int64(b)
 		hash *= 0x1000193
 	}
-	return int32(hash)
+	return int64(hash)
 }
 
 // ReadObjectCB read object with callback, the key is ascii only and field name not copied
 func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 	c := iter.nextToken()
+	var field string
 	if c == '{' {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
-			field := iter.readObjectFieldAsBytes()
-			if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+			field = iter.ReadString()
+			c = iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+			if !callback(iter, field) {
 				return false
 			}
 			c = iter.nextToken()
 			for c == ',' {
-				field = iter.readObjectFieldAsBytes()
-				if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+				field = iter.ReadString()
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+				}
+				if !callback(iter, field) {
 					return false
 				}
 				c = iter.nextToken()
@@ -105,14 +144,14 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadObjectCB", `expect " after }`)
+		iter.ReportError("ReadObjectCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadObjectCB", `expect { or n`)
+	iter.ReportError("ReadObjectCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -125,7 +164,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			iter.unreadByte()
 			field := iter.ReadString()
 			if iter.nextToken() != ':' {
-				iter.ReportError("ReadMapCB", "expect : after object field")
+				iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 				return false
 			}
 			if !callback(iter, field) {
@@ -135,7 +174,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			for c == ',' {
 				field = iter.ReadString()
 				if iter.nextToken() != ':' {
-					iter.ReportError("ReadMapCB", "expect : after object field")
+					iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 					return false
 				}
 				if !callback(iter, field) {
@@ -152,14 +191,14 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadMapCB", `expect " after }`)
+		iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadMapCB", `expect { or n`)
+	iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -176,7 +215,7 @@ func (iter *Iterator) readObjectStart() bool {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return false
 	}
-	iter.ReportError("readObjectStart", "expect { or n")
+	iter.ReportError("readObjectStart", "expect { or n, but found "+string([]byte{c}))
 	return false
 }
 
@@ -192,7 +231,7 @@ func (iter *Iterator) readObjectFieldAsBytes() (ret []byte) {
 		}
 	}
 	if iter.buf[iter.head] != ':' {
-		iter.ReportError("readObjectFieldAsBytes", "expect : after object field")
+		iter.ReportError("readObjectFieldAsBytes", "expect : after object field, but found "+string([]byte{iter.buf[iter.head]}))
 		return
 	}
 	iter.head++
diff --git a/vendor/github.com/json-iterator/go/feature_iter_skip.go b/vendor/github.com/json-iterator/go/iter_skip.go
index b008d98c9..f58beb913 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_skip.go
+++ b/vendor/github.com/json-iterator/go/iter_skip.go
@@ -25,7 +25,7 @@ func (iter *Iterator) ReadBool() (ret bool) {
 		iter.skipFourBytes('a', 'l', 's', 'e')
 		return false
 	}
-	iter.ReportError("ReadBool", "expect t or f")
+	iter.ReportError("ReadBool", "expect t or f, but found "+string([]byte{c}))
 	return
 }
 
@@ -59,7 +59,9 @@ func (iter *Iterator) stopCapture() []byte {
 	iter.captureStartedAt = -1
 	iter.captured = nil
 	if len(captured) == 0 {
-		return remaining
+		copied := make([]byte, len(remaining))
+		copy(copied, remaining)
+		return copied
 	}
 	captured = append(captured, remaining...)
 	return captured
diff --git a/vendor/github.com/json-iterator/go/feature_iter_skip_sloppy.go b/vendor/github.com/json-iterator/go/iter_skip_sloppy.go
index 047d58a4b..8fcdc3b69 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_skip_sloppy.go
+++ b/vendor/github.com/json-iterator/go/iter_skip_sloppy.go
@@ -1,4 +1,4 @@
-//+build jsoniter-sloppy
+//+build jsoniter_sloppy
 
 package jsoniter
 
diff --git a/vendor/github.com/json-iterator/go/feature_iter_skip_strict.go b/vendor/github.com/json-iterator/go/iter_skip_strict.go
index d26763825..f67bc2e83 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_skip_strict.go
+++ b/vendor/github.com/json-iterator/go/iter_skip_strict.go
@@ -1,4 +1,4 @@
-//+build !jsoniter-sloppy
+//+build !jsoniter_sloppy
 
 package jsoniter
 
@@ -64,7 +64,7 @@ func (iter *Iterator) trySkipString() bool {
 		} else if c == '\\' {
 			return false
 		} else if c < ' ' {
-			iter.ReportError("ReadString",
+			iter.ReportError("trySkipString",
 				fmt.Sprintf(`invalid control character found: %d`, c))
 			return true // already failed
 		}
diff --git a/vendor/github.com/json-iterator/go/feature_iter_string.go b/vendor/github.com/json-iterator/go/iter_str.go
index b76460046..adc487ea8 100644
--- a/vendor/github.com/json-iterator/go/feature_iter_string.go
+++ b/vendor/github.com/json-iterator/go/iter_str.go
@@ -28,7 +28,7 @@ func (iter *Iterator) ReadString() (ret string) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return ""
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadString", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -47,7 +47,7 @@ func (iter *Iterator) readStringSlowPath() (ret string) {
 			str = append(str, c)
 		}
 	}
-	iter.ReportError("ReadString", "unexpected end of input")
+	iter.ReportError("readStringSlowPath", "unexpected end of input")
 	return
 }
 
@@ -104,7 +104,7 @@ func (iter *Iterator) readEscapedChar(c byte, str []byte) []byte {
 	case 't':
 		str = append(str, '\t')
 	default:
-		iter.ReportError("ReadString",
+		iter.ReportError("readEscapedChar",
 			`invalid escape char after \`)
 		return nil
 	}
@@ -139,7 +139,7 @@ func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
 		}
 		return copied
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadStringAsSlice", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -156,7 +156,7 @@ func (iter *Iterator) readU4() (ret rune) {
 		} else if c >= 'A' && c <= 'F' {
 			ret = ret*16 + rune(c-'A'+10)
 		} else {
-			iter.ReportError("readU4", "expects 0~9 or a~f")
+			iter.ReportError("readU4", "expects 0~9 or a~f, but found "+string([]byte{c}))
 			return
 		}
 	}
diff --git a/vendor/github.com/json-iterator/go/feature_pool.go b/vendor/github.com/json-iterator/go/pool.go
index 73962bc6f..e2389b56c 100644
--- a/vendor/github.com/json-iterator/go/feature_pool.go
+++ b/vendor/github.com/json-iterator/go/pool.go
@@ -17,41 +17,26 @@ type StreamPool interface {
 }
 
 func (cfg *frozenConfig) BorrowStream(writer io.Writer) *Stream {
-	select {
-	case stream := <-cfg.streamPool:
-		stream.Reset(writer)
-		return stream
-	default:
-		return NewStream(cfg, writer, 512)
-	}
+	stream := cfg.streamPool.Get().(*Stream)
+	stream.Reset(writer)
+	return stream
 }
 
 func (cfg *frozenConfig) ReturnStream(stream *Stream) {
+	stream.out = nil
 	stream.Error = nil
-	select {
-	case cfg.streamPool <- stream:
-		return
-	default:
-		return
-	}
+	stream.Attachment = nil
+	cfg.streamPool.Put(stream)
 }
 
 func (cfg *frozenConfig) BorrowIterator(data []byte) *Iterator {
-	select {
-	case iter := <-cfg.iteratorPool:
-		iter.ResetBytes(data)
-		return iter
-	default:
-		return ParseBytes(cfg, data)
-	}
+	iter := cfg.iteratorPool.Get().(*Iterator)
+	iter.ResetBytes(data)
+	return iter
 }
 
 func (cfg *frozenConfig) ReturnIterator(iter *Iterator) {
 	iter.Error = nil
-	select {
-	case cfg.iteratorPool <- iter:
-		return
-	default:
-		return
-	}
+	iter.Attachment = nil
+	cfg.iteratorPool.Put(iter)
 }
diff --git a/vendor/github.com/json-iterator/go/reflect.go b/vendor/github.com/json-iterator/go/reflect.go
new file mode 100644
index 000000000..4459e203f
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect.go
@@ -0,0 +1,332 @@
+package jsoniter
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+
+	"github.com/modern-go/reflect2"
+)
+
+// ValDecoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.ValDecoder with json.Decoder.
+// For json.Decoder's adapter, refer to jsoniter.AdapterDecoder(todo link).
+//
+// Reflection on type to create decoders, which is then cached
+// Reflection on value is avoided as we can, as the reflect.Value itself will allocate, with following exceptions
+// 1. create instance of new value, for example *int will need a int to be allocated
+// 2. append to slice, if the existing cap is not enough, allocate will be done using Reflect.New
+// 3. assignment to map, both key and value will be reflect.Value
+// For a simple struct binding, it will be reflect.Value free and allocation free
+type ValDecoder interface {
+	Decode(ptr unsafe.Pointer, iter *Iterator)
+}
+
+// ValEncoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.ValEncoder with json.Encoder.
+// For json.Encoder's adapter, refer to jsoniter.AdapterEncoder(todo godoc link).
+type ValEncoder interface {
+	IsEmpty(ptr unsafe.Pointer) bool
+	Encode(ptr unsafe.Pointer, stream *Stream)
+}
+
+type checkIsEmpty interface {
+	IsEmpty(ptr unsafe.Pointer) bool
+}
+
+type ctx struct {
+	*frozenConfig
+	prefix   string
+	encoders map[reflect2.Type]ValEncoder
+	decoders map[reflect2.Type]ValDecoder
+}
+
+func (b *ctx) caseSensitive() bool {
+	if b.frozenConfig == nil {
+		// default is case-insensitive
+		return false
+	}
+	return b.frozenConfig.caseSensitive
+}
+
+func (b *ctx) append(prefix string) *ctx {
+	return &ctx{
+		frozenConfig: b.frozenConfig,
+		prefix:       b.prefix + " " + prefix,
+		encoders:     b.encoders,
+		decoders:     b.decoders,
+	}
+}
+
+// ReadVal copy the underlying JSON into go interface, same as json.Unmarshal
+func (iter *Iterator) ReadVal(obj interface{}) {
+	cacheKey := reflect2.RTypeOf(obj)
+	decoder := iter.cfg.getDecoderFromCache(cacheKey)
+	if decoder == nil {
+		typ := reflect2.TypeOf(obj)
+		if typ.Kind() != reflect.Ptr {
+			iter.ReportError("ReadVal", "can only unmarshal into pointer")
+			return
+		}
+		decoder = iter.cfg.DecoderOf(typ)
+	}
+	ptr := reflect2.PtrOf(obj)
+	if ptr == nil {
+		iter.ReportError("ReadVal", "can not read into nil pointer")
+		return
+	}
+	decoder.Decode(ptr, iter)
+}
+
+// WriteVal copy the go interface into underlying JSON, same as json.Marshal
+func (stream *Stream) WriteVal(val interface{}) {
+	if nil == val {
+		stream.WriteNil()
+		return
+	}
+	cacheKey := reflect2.RTypeOf(val)
+	encoder := stream.cfg.getEncoderFromCache(cacheKey)
+	if encoder == nil {
+		typ := reflect2.TypeOf(val)
+		encoder = stream.cfg.EncoderOf(typ)
+	}
+	encoder.Encode(reflect2.PtrOf(val), stream)
+}
+
+func (cfg *frozenConfig) DecoderOf(typ reflect2.Type) ValDecoder {
+	cacheKey := typ.RType()
+	decoder := cfg.getDecoderFromCache(cacheKey)
+	if decoder != nil {
+		return decoder
+	}
+	ctx := &ctx{
+		frozenConfig: cfg,
+		prefix:       "",
+		decoders:     map[reflect2.Type]ValDecoder{},
+		encoders:     map[reflect2.Type]ValEncoder{},
+	}
+	ptrType := typ.(*reflect2.UnsafePtrType)
+	decoder = decoderOfType(ctx, ptrType.Elem())
+	cfg.addDecoderToCache(cacheKey, decoder)
+	return decoder
+}
+
+func decoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+	decoder := getTypeDecoderFromExtension(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	decoder = createDecoderOfType(ctx, typ)
+	for _, extension := range extensions {
+		decoder = extension.DecorateDecoder(typ, decoder)
+	}
+	decoder = ctx.decoderExtension.DecorateDecoder(typ, decoder)
+	for _, extension := range ctx.extraExtensions {
+		decoder = extension.DecorateDecoder(typ, decoder)
+	}
+	return decoder
+}
+
+func createDecoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+	decoder := ctx.decoders[typ]
+	if decoder != nil {
+		return decoder
+	}
+	placeholder := &placeholderDecoder{}
+	ctx.decoders[typ] = placeholder
+	decoder = _createDecoderOfType(ctx, typ)
+	placeholder.decoder = decoder
+	return decoder
+}
+
+func _createDecoderOfType(ctx *ctx, typ reflect2.Type) ValDecoder {
+	decoder := createDecoderOfJsonRawMessage(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	decoder = createDecoderOfJsonNumber(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	decoder = createDecoderOfMarshaler(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	decoder = createDecoderOfAny(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	decoder = createDecoderOfNative(ctx, typ)
+	if decoder != nil {
+		return decoder
+	}
+	switch typ.Kind() {
+	case reflect.Interface:
+		ifaceType, isIFace := typ.(*reflect2.UnsafeIFaceType)
+		if isIFace {
+			return &ifaceDecoder{valType: ifaceType}
+		}
+		return &efaceDecoder{}
+	case reflect.Struct:
+		return decoderOfStruct(ctx, typ)
+	case reflect.Array:
+		return decoderOfArray(ctx, typ)
+	case reflect.Slice:
+		return decoderOfSlice(ctx, typ)
+	case reflect.Map:
+		return decoderOfMap(ctx, typ)
+	case reflect.Ptr:
+		return decoderOfOptional(ctx, typ)
+	default:
+		return &lazyErrorDecoder{err: fmt.Errorf("%s%s is unsupported type", ctx.prefix, typ.String())}
+	}
+}
+
+func (cfg *frozenConfig) EncoderOf(typ reflect2.Type) ValEncoder {
+	cacheKey := typ.RType()
+	encoder := cfg.getEncoderFromCache(cacheKey)
+	if encoder != nil {
+		return encoder
+	}
+	ctx := &ctx{
+		frozenConfig: cfg,
+		prefix:       "",
+		decoders:     map[reflect2.Type]ValDecoder{},
+		encoders:     map[reflect2.Type]ValEncoder{},
+	}
+	encoder = encoderOfType(ctx, typ)
+	if typ.LikePtr() {
+		encoder = &onePtrEncoder{encoder}
+	}
+	cfg.addEncoderToCache(cacheKey, encoder)
+	return encoder
+}
+
+type onePtrEncoder struct {
+	encoder ValEncoder
+}
+
+func (encoder *onePtrEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.encoder.IsEmpty(unsafe.Pointer(&ptr))
+}
+
+func (encoder *onePtrEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.encoder.Encode(unsafe.Pointer(&ptr), stream)
+}
+
+func encoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+	encoder := getTypeEncoderFromExtension(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	encoder = createEncoderOfType(ctx, typ)
+	for _, extension := range extensions {
+		encoder = extension.DecorateEncoder(typ, encoder)
+	}
+	encoder = ctx.encoderExtension.DecorateEncoder(typ, encoder)
+	for _, extension := range ctx.extraExtensions {
+		encoder = extension.DecorateEncoder(typ, encoder)
+	}
+	return encoder
+}
+
+func createEncoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+	encoder := ctx.encoders[typ]
+	if encoder != nil {
+		return encoder
+	}
+	placeholder := &placeholderEncoder{}
+	ctx.encoders[typ] = placeholder
+	encoder = _createEncoderOfType(ctx, typ)
+	placeholder.encoder = encoder
+	return encoder
+}
+func _createEncoderOfType(ctx *ctx, typ reflect2.Type) ValEncoder {
+	encoder := createEncoderOfJsonRawMessage(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	encoder = createEncoderOfJsonNumber(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	encoder = createEncoderOfMarshaler(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	encoder = createEncoderOfAny(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	encoder = createEncoderOfNative(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	kind := typ.Kind()
+	switch kind {
+	case reflect.Interface:
+		return &dynamicEncoder{typ}
+	case reflect.Struct:
+		return encoderOfStruct(ctx, typ)
+	case reflect.Array:
+		return encoderOfArray(ctx, typ)
+	case reflect.Slice:
+		return encoderOfSlice(ctx, typ)
+	case reflect.Map:
+		return encoderOfMap(ctx, typ)
+	case reflect.Ptr:
+		return encoderOfOptional(ctx, typ)
+	default:
+		return &lazyErrorEncoder{err: fmt.Errorf("%s%s is unsupported type", ctx.prefix, typ.String())}
+	}
+}
+
+type lazyErrorDecoder struct {
+	err error
+}
+
+func (decoder *lazyErrorDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.WhatIsNext() != NilValue {
+		if iter.Error == nil {
+			iter.Error = decoder.err
+		}
+	} else {
+		iter.Skip()
+	}
+}
+
+type lazyErrorEncoder struct {
+	err error
+}
+
+func (encoder *lazyErrorEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if ptr == nil {
+		stream.WriteNil()
+	} else if stream.Error == nil {
+		stream.Error = encoder.err
+	}
+}
+
+func (encoder *lazyErrorEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return false
+}
+
+type placeholderDecoder struct {
+	decoder ValDecoder
+}
+
+func (decoder *placeholderDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.decoder.Decode(ptr, iter)
+}
+
+type placeholderEncoder struct {
+	encoder ValEncoder
+}
+
+func (encoder *placeholderEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.encoder.Encode(ptr, stream)
+}
+
+func (encoder *placeholderEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.encoder.IsEmpty(ptr)
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_array.go b/vendor/github.com/json-iterator/go/reflect_array.go
new file mode 100644
index 000000000..13a0b7b08
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_array.go
@@ -0,0 +1,104 @@
+package jsoniter
+
+import (
+	"fmt"
+	"github.com/modern-go/reflect2"
+	"io"
+	"unsafe"
+)
+
+func decoderOfArray(ctx *ctx, typ reflect2.Type) ValDecoder {
+	arrayType := typ.(*reflect2.UnsafeArrayType)
+	decoder := decoderOfType(ctx.append("[arrayElem]"), arrayType.Elem())
+	return &arrayDecoder{arrayType, decoder}
+}
+
+func encoderOfArray(ctx *ctx, typ reflect2.Type) ValEncoder {
+	arrayType := typ.(*reflect2.UnsafeArrayType)
+	if arrayType.Len() == 0 {
+		return emptyArrayEncoder{}
+	}
+	encoder := encoderOfType(ctx.append("[arrayElem]"), arrayType.Elem())
+	return &arrayEncoder{arrayType, encoder}
+}
+
+type emptyArrayEncoder struct{}
+
+func (encoder emptyArrayEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteEmptyArray()
+}
+
+func (encoder emptyArrayEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return true
+}
+
+type arrayEncoder struct {
+	arrayType   *reflect2.UnsafeArrayType
+	elemEncoder ValEncoder
+}
+
+func (encoder *arrayEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteArrayStart()
+	elemPtr := unsafe.Pointer(ptr)
+	encoder.elemEncoder.Encode(elemPtr, stream)
+	for i := 1; i < encoder.arrayType.Len(); i++ {
+		stream.WriteMore()
+		elemPtr = encoder.arrayType.UnsafeGetIndex(ptr, i)
+		encoder.elemEncoder.Encode(elemPtr, stream)
+	}
+	stream.WriteArrayEnd()
+	if stream.Error != nil && stream.Error != io.EOF {
+		stream.Error = fmt.Errorf("%v: %s", encoder.arrayType, stream.Error.Error())
+	}
+}
+
+func (encoder *arrayEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return false
+}
+
+type arrayDecoder struct {
+	arrayType   *reflect2.UnsafeArrayType
+	elemDecoder ValDecoder
+}
+
+func (decoder *arrayDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.doDecode(ptr, iter)
+	if iter.Error != nil && iter.Error != io.EOF {
+		iter.Error = fmt.Errorf("%v: %s", decoder.arrayType, iter.Error.Error())
+	}
+}
+
+func (decoder *arrayDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
+	c := iter.nextToken()
+	arrayType := decoder.arrayType
+	if c == 'n' {
+		iter.skipThreeBytes('u', 'l', 'l')
+		return
+	}
+	if c != '[' {
+		iter.ReportError("decode array", "expect [ or n, but found "+string([]byte{c}))
+		return
+	}
+	c = iter.nextToken()
+	if c == ']' {
+		return
+	}
+	iter.unreadByte()
+	elemPtr := arrayType.UnsafeGetIndex(ptr, 0)
+	decoder.elemDecoder.Decode(elemPtr, iter)
+	length := 1
+	for c = iter.nextToken(); c == ','; c = iter.nextToken() {
+		if length >= arrayType.Len() {
+			iter.Skip()
+			continue
+		}
+		idx := length
+		length += 1
+		elemPtr = arrayType.UnsafeGetIndex(ptr, idx)
+		decoder.elemDecoder.Decode(elemPtr, iter)
+	}
+	if c != ']' {
+		iter.ReportError("decode array", "expect ], but found "+string([]byte{c}))
+		return
+	}
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_dynamic.go b/vendor/github.com/json-iterator/go/reflect_dynamic.go
new file mode 100644
index 000000000..8b6bc8b43
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_dynamic.go
@@ -0,0 +1,70 @@
+package jsoniter
+
+import (
+	"github.com/modern-go/reflect2"
+	"reflect"
+	"unsafe"
+)
+
+type dynamicEncoder struct {
+	valType reflect2.Type
+}
+
+func (encoder *dynamicEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	obj := encoder.valType.UnsafeIndirect(ptr)
+	stream.WriteVal(obj)
+}
+
+func (encoder *dynamicEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.valType.UnsafeIndirect(ptr) == nil
+}
+
+type efaceDecoder struct {
+}
+
+func (decoder *efaceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	pObj := (*interface{})(ptr)
+	obj := *pObj
+	if obj == nil {
+		*pObj = iter.Read()
+		return
+	}
+	typ := reflect2.TypeOf(obj)
+	if typ.Kind() != reflect.Ptr {
+		*pObj = iter.Read()
+		return
+	}
+	ptrType := typ.(*reflect2.UnsafePtrType)
+	ptrElemType := ptrType.Elem()
+	if iter.WhatIsNext() == NilValue {
+		if ptrElemType.Kind() != reflect.Ptr {
+			iter.skipFourBytes('n', 'u', 'l', 'l')
+			*pObj = nil
+			return
+		}
+	}
+	if reflect2.IsNil(obj) {
+		obj := ptrElemType.New()
+		iter.ReadVal(obj)
+		*pObj = obj
+		return
+	}
+	iter.ReadVal(obj)
+}
+
+type ifaceDecoder struct {
+	valType *reflect2.UnsafeIFaceType
+}
+
+func (decoder *ifaceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.ReadNil() {
+		decoder.valType.UnsafeSet(ptr, decoder.valType.UnsafeNew())
+		return
+	}
+	obj := decoder.valType.UnsafeIndirect(ptr)
+	if reflect2.IsNil(obj) {
+		iter.ReportError("decode non empty interface", "can not unmarshal into nil")
+		return
+	}
+	iter.ReadVal(obj)
+}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_extension.go b/vendor/github.com/json-iterator/go/reflect_extension.go
index 3dd38299d..04f68756b 100644
--- a/vendor/github.com/json-iterator/go/feature_reflect_extension.go
+++ b/vendor/github.com/json-iterator/go/reflect_extension.go
@@ -2,6 +2,7 @@ package jsoniter
 
 import (
 	"fmt"
+	"github.com/modern-go/reflect2"
 	"reflect"
 	"sort"
 	"strings"
@@ -17,17 +18,15 @@ var extensions = []Extension{}
 
 // StructDescriptor describe how should we encode/decode the struct
 type StructDescriptor struct {
-	onePtrEmbedded     bool
-	onePtrOptimization bool
-	Type               reflect.Type
-	Fields             []*Binding
+	Type   reflect2.Type
+	Fields []*Binding
 }
 
 // GetField get one field from the descriptor by its name.
 // Can not use map here to keep field orders.
 func (structDescriptor *StructDescriptor) GetField(fieldName string) *Binding {
 	for _, binding := range structDescriptor.Fields {
-		if binding.Field.Name == fieldName {
+		if binding.Field.Name() == fieldName {
 			return binding
 		}
 	}
@@ -37,7 +36,7 @@ func (structDescriptor *StructDescriptor) GetField(fieldName string) *Binding {
 // Binding describe how should we encode/decode the struct field
 type Binding struct {
 	levels    []int
-	Field     *reflect.StructField
+	Field     reflect2.StructField
 	FromNames []string
 	ToNames   []string
 	Encoder   ValEncoder
@@ -48,10 +47,12 @@ type Binding struct {
 // Can also rename fields by UpdateStructDescriptor.
 type Extension interface {
 	UpdateStructDescriptor(structDescriptor *StructDescriptor)
-	CreateDecoder(typ reflect.Type) ValDecoder
-	CreateEncoder(typ reflect.Type) ValEncoder
-	DecorateDecoder(typ reflect.Type, decoder ValDecoder) ValDecoder
-	DecorateEncoder(typ reflect.Type, encoder ValEncoder) ValEncoder
+	CreateMapKeyDecoder(typ reflect2.Type) ValDecoder
+	CreateMapKeyEncoder(typ reflect2.Type) ValEncoder
+	CreateDecoder(typ reflect2.Type) ValDecoder
+	CreateEncoder(typ reflect2.Type) ValEncoder
+	DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder
+	DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder
 }
 
 // DummyExtension embed this type get dummy implementation for all methods of Extension
@@ -62,23 +63,105 @@ type DummyExtension struct {
 func (extension *DummyExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
 }
 
+// CreateMapKeyDecoder No-op
+func (extension *DummyExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
+	return nil
+}
+
+// CreateMapKeyEncoder No-op
+func (extension *DummyExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
+	return nil
+}
+
+// CreateDecoder No-op
+func (extension *DummyExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
+	return nil
+}
+
+// CreateEncoder No-op
+func (extension *DummyExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
+	return nil
+}
+
+// DecorateDecoder No-op
+func (extension *DummyExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
+	return decoder
+}
+
+// DecorateEncoder No-op
+func (extension *DummyExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
+	return encoder
+}
+
+type EncoderExtension map[reflect2.Type]ValEncoder
+
+// UpdateStructDescriptor No-op
+func (extension EncoderExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
+}
+
 // CreateDecoder No-op
-func (extension *DummyExtension) CreateDecoder(typ reflect.Type) ValDecoder {
+func (extension EncoderExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
+	return nil
+}
+
+// CreateEncoder get encoder from map
+func (extension EncoderExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
+	return extension[typ]
+}
+
+// CreateMapKeyDecoder No-op
+func (extension EncoderExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
+	return nil
+}
+
+// CreateMapKeyEncoder No-op
+func (extension EncoderExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
+	return nil
+}
+
+// DecorateDecoder No-op
+func (extension EncoderExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
+	return decoder
+}
+
+// DecorateEncoder No-op
+func (extension EncoderExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
+	return encoder
+}
+
+type DecoderExtension map[reflect2.Type]ValDecoder
+
+// UpdateStructDescriptor No-op
+func (extension DecoderExtension) UpdateStructDescriptor(structDescriptor *StructDescriptor) {
+}
+
+// CreateMapKeyDecoder No-op
+func (extension DecoderExtension) CreateMapKeyDecoder(typ reflect2.Type) ValDecoder {
+	return nil
+}
+
+// CreateMapKeyEncoder No-op
+func (extension DecoderExtension) CreateMapKeyEncoder(typ reflect2.Type) ValEncoder {
 	return nil
 }
 
+// CreateDecoder get decoder from map
+func (extension DecoderExtension) CreateDecoder(typ reflect2.Type) ValDecoder {
+	return extension[typ]
+}
+
 // CreateEncoder No-op
-func (extension *DummyExtension) CreateEncoder(typ reflect.Type) ValEncoder {
+func (extension DecoderExtension) CreateEncoder(typ reflect2.Type) ValEncoder {
 	return nil
 }
 
 // DecorateDecoder No-op
-func (extension *DummyExtension) DecorateDecoder(typ reflect.Type, decoder ValDecoder) ValDecoder {
+func (extension DecoderExtension) DecorateDecoder(typ reflect2.Type, decoder ValDecoder) ValDecoder {
 	return decoder
 }
 
 // DecorateEncoder No-op
-func (extension *DummyExtension) DecorateEncoder(typ reflect.Type, encoder ValEncoder) ValEncoder {
+func (extension DecoderExtension) DecorateEncoder(typ reflect2.Type, encoder ValEncoder) ValEncoder {
 	return encoder
 }
 
@@ -99,10 +182,6 @@ func (encoder *funcEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	encoder.fun(ptr, stream)
 }
 
-func (encoder *funcEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
 func (encoder *funcEncoder) IsEmpty(ptr unsafe.Pointer) bool {
 	if encoder.isEmptyFunc == nil {
 		return false
@@ -161,132 +240,151 @@ func RegisterExtension(extension Extension) {
 	extensions = append(extensions, extension)
 }
 
-func getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
-	decoder := _getTypeDecoderFromExtension(typ)
+func getTypeDecoderFromExtension(ctx *ctx, typ reflect2.Type) ValDecoder {
+	decoder := _getTypeDecoderFromExtension(ctx, typ)
 	if decoder != nil {
 		for _, extension := range extensions {
 			decoder = extension.DecorateDecoder(typ, decoder)
 		}
+		decoder = ctx.decoderExtension.DecorateDecoder(typ, decoder)
+		for _, extension := range ctx.extraExtensions {
+			decoder = extension.DecorateDecoder(typ, decoder)
+		}
 	}
 	return decoder
 }
-func _getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
+func _getTypeDecoderFromExtension(ctx *ctx, typ reflect2.Type) ValDecoder {
 	for _, extension := range extensions {
 		decoder := extension.CreateDecoder(typ)
 		if decoder != nil {
 			return decoder
 		}
 	}
+	decoder := ctx.decoderExtension.CreateDecoder(typ)
+	if decoder != nil {
+		return decoder
+	}
+	for _, extension := range ctx.extraExtensions {
+		decoder := extension.CreateDecoder(typ)
+		if decoder != nil {
+			return decoder
+		}
+	}
 	typeName := typ.String()
-	decoder := typeDecoders[typeName]
+	decoder = typeDecoders[typeName]
 	if decoder != nil {
 		return decoder
 	}
 	if typ.Kind() == reflect.Ptr {
-		decoder := typeDecoders[typ.Elem().String()]
+		ptrType := typ.(*reflect2.UnsafePtrType)
+		decoder := typeDecoders[ptrType.Elem().String()]
 		if decoder != nil {
-			return &optionalDecoder{typ.Elem(), decoder}
+			return &OptionalDecoder{ptrType.Elem(), decoder}
 		}
 	}
 	return nil
 }
 
-func getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
-	encoder := _getTypeEncoderFromExtension(typ)
+func getTypeEncoderFromExtension(ctx *ctx, typ reflect2.Type) ValEncoder {
+	encoder := _getTypeEncoderFromExtension(ctx, typ)
 	if encoder != nil {
 		for _, extension := range extensions {
 			encoder = extension.DecorateEncoder(typ, encoder)
 		}
+		encoder = ctx.encoderExtension.DecorateEncoder(typ, encoder)
+		for _, extension := range ctx.extraExtensions {
+			encoder = extension.DecorateEncoder(typ, encoder)
+		}
 	}
 	return encoder
 }
 
-func _getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
+func _getTypeEncoderFromExtension(ctx *ctx, typ reflect2.Type) ValEncoder {
 	for _, extension := range extensions {
 		encoder := extension.CreateEncoder(typ)
 		if encoder != nil {
 			return encoder
 		}
 	}
+	encoder := ctx.encoderExtension.CreateEncoder(typ)
+	if encoder != nil {
+		return encoder
+	}
+	for _, extension := range ctx.extraExtensions {
+		encoder := extension.CreateEncoder(typ)
+		if encoder != nil {
+			return encoder
+		}
+	}
 	typeName := typ.String()
-	encoder := typeEncoders[typeName]
+	encoder = typeEncoders[typeName]
 	if encoder != nil {
 		return encoder
 	}
 	if typ.Kind() == reflect.Ptr {
-		encoder := typeEncoders[typ.Elem().String()]
+		typePtr := typ.(*reflect2.UnsafePtrType)
+		encoder := typeEncoders[typePtr.Elem().String()]
 		if encoder != nil {
-			return &optionalEncoder{encoder}
+			return &OptionalEncoder{encoder}
 		}
 	}
 	return nil
 }
 
-func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, error) {
+func describeStruct(ctx *ctx, typ reflect2.Type) *StructDescriptor {
+	structType := typ.(*reflect2.UnsafeStructType)
 	embeddedBindings := []*Binding{}
 	bindings := []*Binding{}
-	for i := 0; i < typ.NumField(); i++ {
-		field := typ.Field(i)
-		tag := field.Tag.Get(cfg.getTagKey())
+	for i := 0; i < structType.NumField(); i++ {
+		field := structType.Field(i)
+		tag, hastag := field.Tag().Lookup(ctx.getTagKey())
+		if ctx.onlyTaggedField && !hastag {
+			continue
+		}
 		tagParts := strings.Split(tag, ",")
 		if tag == "-" {
 			continue
 		}
-		if field.Anonymous && (tag == "" || tagParts[0] == "") {
-			if field.Type.Kind() == reflect.Struct {
-				structDescriptor, err := describeStruct(cfg, field.Type)
-				if err != nil {
-					return nil, err
-				}
+		if field.Anonymous() && (tag == "" || tagParts[0] == "") {
+			if field.Type().Kind() == reflect.Struct {
+				structDescriptor := describeStruct(ctx, field.Type())
 				for _, binding := range structDescriptor.Fields {
 					binding.levels = append([]int{i}, binding.levels...)
 					omitempty := binding.Encoder.(*structFieldEncoder).omitempty
-					binding.Encoder = &structFieldEncoder{&field, binding.Encoder, omitempty}
-					binding.Decoder = &structFieldDecoder{&field, binding.Decoder}
+					binding.Encoder = &structFieldEncoder{field, binding.Encoder, omitempty}
+					binding.Decoder = &structFieldDecoder{field, binding.Decoder}
 					embeddedBindings = append(embeddedBindings, binding)
 				}
 				continue
-			} else if field.Type.Kind() == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct {
-				structDescriptor, err := describeStruct(cfg, field.Type.Elem())
-				if err != nil {
-					return nil, err
+			} else if field.Type().Kind() == reflect.Ptr {
+				ptrType := field.Type().(*reflect2.UnsafePtrType)
+				if ptrType.Elem().Kind() == reflect.Struct {
+					structDescriptor := describeStruct(ctx, ptrType.Elem())
+					for _, binding := range structDescriptor.Fields {
+						binding.levels = append([]int{i}, binding.levels...)
+						omitempty := binding.Encoder.(*structFieldEncoder).omitempty
+						binding.Encoder = &dereferenceEncoder{binding.Encoder}
+						binding.Encoder = &structFieldEncoder{field, binding.Encoder, omitempty}
+						binding.Decoder = &dereferenceDecoder{ptrType.Elem(), binding.Decoder}
+						binding.Decoder = &structFieldDecoder{field, binding.Decoder}
+						embeddedBindings = append(embeddedBindings, binding)
+					}
+					continue
 				}
-				for _, binding := range structDescriptor.Fields {
-					binding.levels = append([]int{i}, binding.levels...)
-					omitempty := binding.Encoder.(*structFieldEncoder).omitempty
-					binding.Encoder = &optionalEncoder{binding.Encoder}
-					binding.Encoder = &structFieldEncoder{&field, binding.Encoder, omitempty}
-					binding.Decoder = &deferenceDecoder{field.Type.Elem(), binding.Decoder}
-					binding.Decoder = &structFieldDecoder{&field, binding.Decoder}
-					embeddedBindings = append(embeddedBindings, binding)
-				}
-				continue
 			}
 		}
-		fieldNames := calcFieldNames(field.Name, tagParts[0], tag)
-		fieldCacheKey := fmt.Sprintf("%s/%s", typ.String(), field.Name)
+		fieldNames := calcFieldNames(field.Name(), tagParts[0], tag)
+		fieldCacheKey := fmt.Sprintf("%s/%s", typ.String(), field.Name())
 		decoder := fieldDecoders[fieldCacheKey]
 		if decoder == nil {
-			var err error
-			decoder, err = decoderOfType(cfg, field.Type)
-			if err != nil {
-				return nil, err
-			}
+			decoder = decoderOfType(ctx.append(field.Name()), field.Type())
 		}
 		encoder := fieldEncoders[fieldCacheKey]
 		if encoder == nil {
-			var err error
-			encoder, err = encoderOfType(cfg, field.Type)
-			if err != nil {
-				return nil, err
-			}
-			// map is stored as pointer in the struct
-			if field.Type.Kind() == reflect.Map {
-				encoder = &optionalEncoder{encoder}
-			}
+			encoder = encoderOfType(ctx.append(field.Name()), field.Type())
 		}
 		binding := &Binding{
-			Field:     &field,
+			Field:     field,
 			FromNames: fieldNames,
 			ToNames:   fieldNames,
 			Decoder:   decoder,
@@ -295,35 +393,22 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		binding.levels = []int{i}
 		bindings = append(bindings, binding)
 	}
-	return createStructDescriptor(cfg, typ, bindings, embeddedBindings), nil
-}
-func createStructDescriptor(cfg *frozenConfig, typ reflect.Type, bindings []*Binding, embeddedBindings []*Binding) *StructDescriptor {
-	onePtrEmbedded := false
-	onePtrOptimization := false
-	if typ.NumField() == 1 {
-		firstField := typ.Field(0)
-		switch firstField.Type.Kind() {
-		case reflect.Ptr:
-			if firstField.Anonymous && firstField.Type.Elem().Kind() == reflect.Struct {
-				onePtrEmbedded = true
-			}
-			fallthrough
-		case reflect.Map:
-			onePtrOptimization = true
-		case reflect.Struct:
-			onePtrOptimization = isStructOnePtr(firstField.Type)
-		}
-	}
+	return createStructDescriptor(ctx, typ, bindings, embeddedBindings)
+}
+func createStructDescriptor(ctx *ctx, typ reflect2.Type, bindings []*Binding, embeddedBindings []*Binding) *StructDescriptor {
 	structDescriptor := &StructDescriptor{
-		onePtrEmbedded:     onePtrEmbedded,
-		onePtrOptimization: onePtrOptimization,
-		Type:               typ,
-		Fields:             bindings,
+		Type:   typ,
+		Fields: bindings,
 	}
 	for _, extension := range extensions {
 		extension.UpdateStructDescriptor(structDescriptor)
 	}
-	processTags(structDescriptor, cfg)
+	ctx.encoderExtension.UpdateStructDescriptor(structDescriptor)
+	ctx.decoderExtension.UpdateStructDescriptor(structDescriptor)
+	for _, extension := range ctx.extraExtensions {
+		extension.UpdateStructDescriptor(structDescriptor)
+	}
+	processTags(structDescriptor, ctx.frozenConfig)
 	// merge normal & embedded bindings & sort with original order
 	allBindings := sortableBindings(append(embeddedBindings, structDescriptor.Fields...))
 	sort.Sort(allBindings)
@@ -331,21 +416,6 @@ func createStructDescriptor(cfg *frozenConfig, typ reflect.Type, bindings []*Bin
 	return structDescriptor
 }
 
-func isStructOnePtr(typ reflect.Type) bool {
-	if typ.NumField() == 1 {
-		firstField := typ.Field(0)
-		switch firstField.Type.Kind() {
-		case reflect.Ptr:
-			return true
-		case reflect.Map:
-			return true
-		case reflect.Struct:
-			return isStructOnePtr(firstField.Type)
-		}
-	}
-	return false
-}
-
 type sortableBindings []*Binding
 
 func (bindings sortableBindings) Len() int {
@@ -373,12 +443,12 @@ func (bindings sortableBindings) Swap(i, j int) {
 func processTags(structDescriptor *StructDescriptor, cfg *frozenConfig) {
 	for _, binding := range structDescriptor.Fields {
 		shouldOmitEmpty := false
-		tagParts := strings.Split(binding.Field.Tag.Get(cfg.getTagKey()), ",")
+		tagParts := strings.Split(binding.Field.Tag().Get(cfg.getTagKey()), ",")
 		for _, tagPart := range tagParts[1:] {
 			if tagPart == "omitempty" {
 				shouldOmitEmpty = true
 			} else if tagPart == "string" {
-				if binding.Field.Type.Kind() == reflect.String {
+				if binding.Field.Type().Kind() == reflect.String {
 					binding.Decoder = &stringModeStringDecoder{binding.Decoder, cfg}
 					binding.Encoder = &stringModeStringEncoder{binding.Encoder, cfg}
 				} else {
diff --git a/vendor/github.com/json-iterator/go/reflect_json_number.go b/vendor/github.com/json-iterator/go/reflect_json_number.go
new file mode 100644
index 000000000..98d45c1ec
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_json_number.go
@@ -0,0 +1,112 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"github.com/modern-go/reflect2"
+	"strconv"
+	"unsafe"
+)
+
+type Number string
+
+// String returns the literal text of the number.
+func (n Number) String() string { return string(n) }
+
+// Float64 returns the number as a float64.
+func (n Number) Float64() (float64, error) {
+	return strconv.ParseFloat(string(n), 64)
+}
+
+// Int64 returns the number as an int64.
+func (n Number) Int64() (int64, error) {
+	return strconv.ParseInt(string(n), 10, 64)
+}
+
+func CastJsonNumber(val interface{}) (string, bool) {
+	switch typedVal := val.(type) {
+	case json.Number:
+		return string(typedVal), true
+	case Number:
+		return string(typedVal), true
+	}
+	return "", false
+}
+
+var jsonNumberType = reflect2.TypeOfPtr((*json.Number)(nil)).Elem()
+var jsoniterNumberType = reflect2.TypeOfPtr((*Number)(nil)).Elem()
+
+func createDecoderOfJsonNumber(ctx *ctx, typ reflect2.Type) ValDecoder {
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}
+	}
+	if typ.AssignableTo(jsoniterNumberType) {
+		return &jsoniterNumberCodec{}
+	}
+	return nil
+}
+
+func createEncoderOfJsonNumber(ctx *ctx, typ reflect2.Type) ValEncoder {
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}
+	}
+	if typ.AssignableTo(jsoniterNumberType) {
+		return &jsoniterNumberCodec{}
+	}
+	return nil
+}
+
+type jsonNumberCodec struct {
+}
+
+func (codec *jsonNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*json.Number)(ptr)) = json.Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*json.Number)(ptr)) = ""
+	default:
+		*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+	}
+}
+
+func (codec *jsonNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	number := *((*json.Number)(ptr))
+	if len(number) == 0 {
+		stream.writeByte('0')
+	} else {
+		stream.WriteRaw(string(number))
+	}
+}
+
+func (codec *jsonNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.Number)(ptr))) == 0
+}
+
+type jsoniterNumberCodec struct {
+}
+
+func (codec *jsoniterNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*Number)(ptr)) = Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*Number)(ptr)) = ""
+	default:
+		*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
+	}
+}
+
+func (codec *jsoniterNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	number := *((*Number)(ptr))
+	if len(number) == 0 {
+		stream.writeByte('0')
+	} else {
+		stream.WriteRaw(string(number))
+	}
+}
+
+func (codec *jsoniterNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*Number)(ptr))) == 0
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_json_raw_message.go b/vendor/github.com/json-iterator/go/reflect_json_raw_message.go
new file mode 100644
index 000000000..f2619936c
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_json_raw_message.go
@@ -0,0 +1,60 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"github.com/modern-go/reflect2"
+	"unsafe"
+)
+
+var jsonRawMessageType = reflect2.TypeOfPtr((*json.RawMessage)(nil)).Elem()
+var jsoniterRawMessageType = reflect2.TypeOfPtr((*RawMessage)(nil)).Elem()
+
+func createEncoderOfJsonRawMessage(ctx *ctx, typ reflect2.Type) ValEncoder {
+	if typ == jsonRawMessageType {
+		return &jsonRawMessageCodec{}
+	}
+	if typ == jsoniterRawMessageType {
+		return &jsoniterRawMessageCodec{}
+	}
+	return nil
+}
+
+func createDecoderOfJsonRawMessage(ctx *ctx, typ reflect2.Type) ValDecoder {
+	if typ == jsonRawMessageType {
+		return &jsonRawMessageCodec{}
+	}
+	if typ == jsoniterRawMessageType {
+		return &jsoniterRawMessageCodec{}
+	}
+	return nil
+}
+
+type jsonRawMessageCodec struct {
+}
+
+func (codec *jsonRawMessageCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*json.RawMessage)(ptr)) = json.RawMessage(iter.SkipAndReturnBytes())
+}
+
+func (codec *jsonRawMessageCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*json.RawMessage)(ptr))))
+}
+
+func (codec *jsonRawMessageCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.RawMessage)(ptr))) == 0
+}
+
+type jsoniterRawMessageCodec struct {
+}
+
+func (codec *jsoniterRawMessageCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*RawMessage)(ptr)) = RawMessage(iter.SkipAndReturnBytes())
+}
+
+func (codec *jsoniterRawMessageCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*RawMessage)(ptr))))
+}
+
+func (codec *jsoniterRawMessageCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*RawMessage)(ptr))) == 0
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_map.go b/vendor/github.com/json-iterator/go/reflect_map.go
new file mode 100644
index 000000000..7f66a88b0
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_map.go
@@ -0,0 +1,326 @@
+package jsoniter
+
+import (
+	"fmt"
+	"github.com/modern-go/reflect2"
+	"io"
+	"reflect"
+	"sort"
+	"unsafe"
+)
+
+func decoderOfMap(ctx *ctx, typ reflect2.Type) ValDecoder {
+	mapType := typ.(*reflect2.UnsafeMapType)
+	keyDecoder := decoderOfMapKey(ctx.append("[mapKey]"), mapType.Key())
+	elemDecoder := decoderOfType(ctx.append("[mapElem]"), mapType.Elem())
+	return &mapDecoder{
+		mapType:     mapType,
+		keyType:     mapType.Key(),
+		elemType:    mapType.Elem(),
+		keyDecoder:  keyDecoder,
+		elemDecoder: elemDecoder,
+	}
+}
+
+func encoderOfMap(ctx *ctx, typ reflect2.Type) ValEncoder {
+	mapType := typ.(*reflect2.UnsafeMapType)
+	if ctx.sortMapKeys {
+		return &sortKeysMapEncoder{
+			mapType:     mapType,
+			keyEncoder:  encoderOfMapKey(ctx.append("[mapKey]"), mapType.Key()),
+			elemEncoder: encoderOfType(ctx.append("[mapElem]"), mapType.Elem()),
+		}
+	}
+	return &mapEncoder{
+		mapType:     mapType,
+		keyEncoder:  encoderOfMapKey(ctx.append("[mapKey]"), mapType.Key()),
+		elemEncoder: encoderOfType(ctx.append("[mapElem]"), mapType.Elem()),
+	}
+}
+
+func decoderOfMapKey(ctx *ctx, typ reflect2.Type) ValDecoder {
+	decoder := ctx.decoderExtension.CreateMapKeyDecoder(typ)
+	if decoder != nil {
+		return decoder
+	}
+	for _, extension := range ctx.extraExtensions {
+		decoder := extension.CreateMapKeyDecoder(typ)
+		if decoder != nil {
+			return decoder
+		}
+	}
+	switch typ.Kind() {
+	case reflect.String:
+		return decoderOfType(ctx, reflect2.DefaultTypeOfKind(reflect.String))
+	case reflect.Bool,
+		reflect.Uint8, reflect.Int8,
+		reflect.Uint16, reflect.Int16,
+		reflect.Uint32, reflect.Int32,
+		reflect.Uint64, reflect.Int64,
+		reflect.Uint, reflect.Int,
+		reflect.Float32, reflect.Float64,
+		reflect.Uintptr:
+		typ = reflect2.DefaultTypeOfKind(typ.Kind())
+		return &numericMapKeyDecoder{decoderOfType(ctx, typ)}
+	default:
+		ptrType := reflect2.PtrTo(typ)
+		if ptrType.Implements(textMarshalerType) {
+			return &referenceDecoder{
+				&textUnmarshalerDecoder{
+					valType: ptrType,
+				},
+			}
+		}
+		if typ.Implements(textMarshalerType) {
+			return &textUnmarshalerDecoder{
+				valType: typ,
+			}
+		}
+		return &lazyErrorDecoder{err: fmt.Errorf("unsupported map key type: %v", typ)}
+	}
+}
+
+func encoderOfMapKey(ctx *ctx, typ reflect2.Type) ValEncoder {
+	encoder := ctx.encoderExtension.CreateMapKeyEncoder(typ)
+	if encoder != nil {
+		return encoder
+	}
+	for _, extension := range ctx.extraExtensions {
+		encoder := extension.CreateMapKeyEncoder(typ)
+		if encoder != nil {
+			return encoder
+		}
+	}
+	switch typ.Kind() {
+	case reflect.String:
+		return encoderOfType(ctx, reflect2.DefaultTypeOfKind(reflect.String))
+	case reflect.Bool,
+		reflect.Uint8, reflect.Int8,
+		reflect.Uint16, reflect.Int16,
+		reflect.Uint32, reflect.Int32,
+		reflect.Uint64, reflect.Int64,
+		reflect.Uint, reflect.Int,
+		reflect.Float32, reflect.Float64,
+		reflect.Uintptr:
+		typ = reflect2.DefaultTypeOfKind(typ.Kind())
+		return &numericMapKeyEncoder{encoderOfType(ctx, typ)}
+	default:
+		if typ == textMarshalerType {
+			return &directTextMarshalerEncoder{
+				stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
+			}
+		}
+		if typ.Implements(textMarshalerType) {
+			return &textMarshalerEncoder{
+				valType:       typ,
+				stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
+			}
+		}
+		if typ.Kind() == reflect.Interface {
+			return &dynamicMapKeyEncoder{ctx, typ}
+		}
+		return &lazyErrorEncoder{err: fmt.Errorf("unsupported map key type: %v", typ)}
+	}
+}
+
+type mapDecoder struct {
+	mapType     *reflect2.UnsafeMapType
+	keyType     reflect2.Type
+	elemType    reflect2.Type
+	keyDecoder  ValDecoder
+	elemDecoder ValDecoder
+}
+
+func (decoder *mapDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	mapType := decoder.mapType
+	c := iter.nextToken()
+	if c == 'n' {
+		iter.skipThreeBytes('u', 'l', 'l')
+		*(*unsafe.Pointer)(ptr) = nil
+		mapType.UnsafeSet(ptr, mapType.UnsafeNew())
+		return
+	}
+	if mapType.UnsafeIsNil(ptr) {
+		mapType.UnsafeSet(ptr, mapType.UnsafeMakeMap(0))
+	}
+	if c != '{' {
+		iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
+		return
+	}
+	c = iter.nextToken()
+	if c == '}' {
+		return
+	}
+	if c != '"' {
+		iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
+		return
+	}
+	iter.unreadByte()
+	key := decoder.keyType.UnsafeNew()
+	decoder.keyDecoder.Decode(key, iter)
+	c = iter.nextToken()
+	if c != ':' {
+		iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
+		return
+	}
+	elem := decoder.elemType.UnsafeNew()
+	decoder.elemDecoder.Decode(elem, iter)
+	decoder.mapType.UnsafeSetIndex(ptr, key, elem)
+	for c = iter.nextToken(); c == ','; c = iter.nextToken() {
+		key := decoder.keyType.UnsafeNew()
+		decoder.keyDecoder.Decode(key, iter)
+		c = iter.nextToken()
+		if c != ':' {
+			iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
+			return
+		}
+		elem := decoder.elemType.UnsafeNew()
+		decoder.elemDecoder.Decode(elem, iter)
+		decoder.mapType.UnsafeSetIndex(ptr, key, elem)
+	}
+	if c != '}' {
+		iter.ReportError("ReadMapCB", `expect }, but found `+string([]byte{c}))
+	}
+}
+
+type numericMapKeyDecoder struct {
+	decoder ValDecoder
+}
+
+func (decoder *numericMapKeyDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	c := iter.nextToken()
+	if c != '"' {
+		iter.ReportError("ReadMapCB", `expect ", but found `+string([]byte{c}))
+		return
+	}
+	decoder.decoder.Decode(ptr, iter)
+	c = iter.nextToken()
+	if c != '"' {
+		iter.ReportError("ReadMapCB", `expect ", but found `+string([]byte{c}))
+		return
+	}
+}
+
+type numericMapKeyEncoder struct {
+	encoder ValEncoder
+}
+
+func (encoder *numericMapKeyEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.writeByte('"')
+	encoder.encoder.Encode(ptr, stream)
+	stream.writeByte('"')
+}
+
+func (encoder *numericMapKeyEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return false
+}
+
+type dynamicMapKeyEncoder struct {
+	ctx     *ctx
+	valType reflect2.Type
+}
+
+func (encoder *dynamicMapKeyEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	obj := encoder.valType.UnsafeIndirect(ptr)
+	encoderOfMapKey(encoder.ctx, reflect2.TypeOf(obj)).Encode(reflect2.PtrOf(obj), stream)
+}
+
+func (encoder *dynamicMapKeyEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	obj := encoder.valType.UnsafeIndirect(ptr)
+	return encoderOfMapKey(encoder.ctx, reflect2.TypeOf(obj)).IsEmpty(reflect2.PtrOf(obj))
+}
+
+type mapEncoder struct {
+	mapType     *reflect2.UnsafeMapType
+	keyEncoder  ValEncoder
+	elemEncoder ValEncoder
+}
+
+func (encoder *mapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteObjectStart()
+	iter := encoder.mapType.UnsafeIterate(ptr)
+	for i := 0; iter.HasNext(); i++ {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		key, elem := iter.UnsafeNext()
+		encoder.keyEncoder.Encode(key, stream)
+		if stream.indention > 0 {
+			stream.writeTwoBytes(byte(':'), byte(' '))
+		} else {
+			stream.writeByte(':')
+		}
+		encoder.elemEncoder.Encode(elem, stream)
+	}
+	stream.WriteObjectEnd()
+}
+
+func (encoder *mapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	iter := encoder.mapType.UnsafeIterate(ptr)
+	return !iter.HasNext()
+}
+
+type sortKeysMapEncoder struct {
+	mapType     *reflect2.UnsafeMapType
+	keyEncoder  ValEncoder
+	elemEncoder ValEncoder
+}
+
+func (encoder *sortKeysMapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *(*unsafe.Pointer)(ptr) == nil {
+		stream.WriteNil()
+		return
+	}
+	stream.WriteObjectStart()
+	mapIter := encoder.mapType.UnsafeIterate(ptr)
+	subStream := stream.cfg.BorrowStream(nil)
+	subIter := stream.cfg.BorrowIterator(nil)
+	keyValues := encodedKeyValues{}
+	for mapIter.HasNext() {
+		subStream.buf = make([]byte, 0, 64)
+		key, elem := mapIter.UnsafeNext()
+		encoder.keyEncoder.Encode(key, subStream)
+		if subStream.Error != nil && subStream.Error != io.EOF && stream.Error == nil {
+			stream.Error = subStream.Error
+		}
+		encodedKey := subStream.Buffer()
+		subIter.ResetBytes(encodedKey)
+		decodedKey := subIter.ReadString()
+		if stream.indention > 0 {
+			subStream.writeTwoBytes(byte(':'), byte(' '))
+		} else {
+			subStream.writeByte(':')
+		}
+		encoder.elemEncoder.Encode(elem, subStream)
+		keyValues = append(keyValues, encodedKV{
+			key:      decodedKey,
+			keyValue: subStream.Buffer(),
+		})
+	}
+	sort.Sort(keyValues)
+	for i, keyValue := range keyValues {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		stream.Write(keyValue.keyValue)
+	}
+	stream.WriteObjectEnd()
+	stream.cfg.ReturnStream(subStream)
+	stream.cfg.ReturnIterator(subIter)
+}
+
+func (encoder *sortKeysMapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	iter := encoder.mapType.UnsafeIterate(ptr)
+	return !iter.HasNext()
+}
+
+type encodedKeyValues []encodedKV
+
+type encodedKV struct {
+	key      string
+	keyValue []byte
+}
+
+func (sv encodedKeyValues) Len() int           { return len(sv) }
+func (sv encodedKeyValues) Swap(i, j int)      { sv[i], sv[j] = sv[j], sv[i] }
+func (sv encodedKeyValues) Less(i, j int) bool { return sv[i].key < sv[j].key }
diff --git a/vendor/github.com/json-iterator/go/reflect_marshaler.go b/vendor/github.com/json-iterator/go/reflect_marshaler.go
new file mode 100644
index 000000000..58ac959ad
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_marshaler.go
@@ -0,0 +1,218 @@
+package jsoniter
+
+import (
+	"encoding"
+	"encoding/json"
+	"github.com/modern-go/reflect2"
+	"unsafe"
+)
+
+var marshalerType = reflect2.TypeOfPtr((*json.Marshaler)(nil)).Elem()
+var unmarshalerType = reflect2.TypeOfPtr((*json.Unmarshaler)(nil)).Elem()
+var textMarshalerType = reflect2.TypeOfPtr((*encoding.TextMarshaler)(nil)).Elem()
+var textUnmarshalerType = reflect2.TypeOfPtr((*encoding.TextUnmarshaler)(nil)).Elem()
+
+func createDecoderOfMarshaler(ctx *ctx, typ reflect2.Type) ValDecoder {
+	ptrType := reflect2.PtrTo(typ)
+	if ptrType.Implements(unmarshalerType) {
+		return &referenceDecoder{
+			&unmarshalerDecoder{ptrType},
+		}
+	}
+	if ptrType.Implements(textUnmarshalerType) {
+		return &referenceDecoder{
+			&textUnmarshalerDecoder{ptrType},
+		}
+	}
+	return nil
+}
+
+func createEncoderOfMarshaler(ctx *ctx, typ reflect2.Type) ValEncoder {
+	if typ == marshalerType {
+		checkIsEmpty := createCheckIsEmpty(ctx, typ)
+		var encoder ValEncoder = &directMarshalerEncoder{
+			checkIsEmpty: checkIsEmpty,
+		}
+		return encoder
+	}
+	if typ.Implements(marshalerType) {
+		checkIsEmpty := createCheckIsEmpty(ctx, typ)
+		var encoder ValEncoder = &marshalerEncoder{
+			valType:      typ,
+			checkIsEmpty: checkIsEmpty,
+		}
+		return encoder
+	}
+	ptrType := reflect2.PtrTo(typ)
+	if ctx.prefix != "" && ptrType.Implements(marshalerType) {
+		checkIsEmpty := createCheckIsEmpty(ctx, ptrType)
+		var encoder ValEncoder = &marshalerEncoder{
+			valType:      ptrType,
+			checkIsEmpty: checkIsEmpty,
+		}
+		return &referenceEncoder{encoder}
+	}
+	if typ == textMarshalerType {
+		checkIsEmpty := createCheckIsEmpty(ctx, typ)
+		var encoder ValEncoder = &directTextMarshalerEncoder{
+			checkIsEmpty:  checkIsEmpty,
+			stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
+		}
+		return encoder
+	}
+	if typ.Implements(textMarshalerType) {
+		checkIsEmpty := createCheckIsEmpty(ctx, typ)
+		var encoder ValEncoder = &textMarshalerEncoder{
+			valType:       typ,
+			stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
+			checkIsEmpty:  checkIsEmpty,
+		}
+		return encoder
+	}
+	// if prefix is empty, the type is the root type
+	if ctx.prefix != "" && ptrType.Implements(textMarshalerType) {
+		checkIsEmpty := createCheckIsEmpty(ctx, ptrType)
+		var encoder ValEncoder = &textMarshalerEncoder{
+			valType:       ptrType,
+			stringEncoder: ctx.EncoderOf(reflect2.TypeOf("")),
+			checkIsEmpty:  checkIsEmpty,
+		}
+		return &referenceEncoder{encoder}
+	}
+	return nil
+}
+
+type marshalerEncoder struct {
+	checkIsEmpty checkIsEmpty
+	valType      reflect2.Type
+}
+
+func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	obj := encoder.valType.UnsafeIndirect(ptr)
+	if encoder.valType.IsNullable() && reflect2.IsNil(obj) {
+		stream.WriteNil()
+		return
+	}
+	marshaler := obj.(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		stream.Error = err
+	} else {
+		stream.Write(bytes)
+	}
+}
+
+func (encoder *marshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.checkIsEmpty.IsEmpty(ptr)
+}
+
+type directMarshalerEncoder struct {
+	checkIsEmpty checkIsEmpty
+}
+
+func (encoder *directMarshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	marshaler := *(*json.Marshaler)(ptr)
+	if marshaler == nil {
+		stream.WriteNil()
+		return
+	}
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		stream.Error = err
+	} else {
+		stream.Write(bytes)
+	}
+}
+
+func (encoder *directMarshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.checkIsEmpty.IsEmpty(ptr)
+}
+
+type textMarshalerEncoder struct {
+	valType       reflect2.Type
+	stringEncoder ValEncoder
+	checkIsEmpty  checkIsEmpty
+}
+
+func (encoder *textMarshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	obj := encoder.valType.UnsafeIndirect(ptr)
+	if encoder.valType.IsNullable() && reflect2.IsNil(obj) {
+		stream.WriteNil()
+		return
+	}
+	marshaler := (obj).(encoding.TextMarshaler)
+	bytes, err := marshaler.MarshalText()
+	if err != nil {
+		stream.Error = err
+	} else {
+		str := string(bytes)
+		encoder.stringEncoder.Encode(unsafe.Pointer(&str), stream)
+	}
+}
+
+func (encoder *textMarshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.checkIsEmpty.IsEmpty(ptr)
+}
+
+type directTextMarshalerEncoder struct {
+	stringEncoder ValEncoder
+	checkIsEmpty  checkIsEmpty
+}
+
+func (encoder *directTextMarshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	marshaler := *(*encoding.TextMarshaler)(ptr)
+	if marshaler == nil {
+		stream.WriteNil()
+		return
+	}
+	bytes, err := marshaler.MarshalText()
+	if err != nil {
+		stream.Error = err
+	} else {
+		str := string(bytes)
+		encoder.stringEncoder.Encode(unsafe.Pointer(&str), stream)
+	}
+}
+
+func (encoder *directTextMarshalerEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.checkIsEmpty.IsEmpty(ptr)
+}
+
+type unmarshalerDecoder struct {
+	valType reflect2.Type
+}
+
+func (decoder *unmarshalerDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	valType := decoder.valType
+	obj := valType.UnsafeIndirect(ptr)
+	unmarshaler := obj.(json.Unmarshaler)
+	iter.nextToken()
+	iter.unreadByte() // skip spaces
+	bytes := iter.SkipAndReturnBytes()
+	err := unmarshaler.UnmarshalJSON(bytes)
+	if err != nil {
+		iter.ReportError("unmarshalerDecoder", err.Error())
+	}
+}
+
+type textUnmarshalerDecoder struct {
+	valType reflect2.Type
+}
+
+func (decoder *textUnmarshalerDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	valType := decoder.valType
+	obj := valType.UnsafeIndirect(ptr)
+	if reflect2.IsNil(obj) {
+		ptrType := valType.(*reflect2.UnsafePtrType)
+		elemType := ptrType.Elem()
+		elem := elemType.UnsafeNew()
+		ptrType.UnsafeSet(ptr, unsafe.Pointer(&elem))
+		obj = valType.UnsafeIndirect(ptr)
+	}
+	unmarshaler := (obj).(encoding.TextUnmarshaler)
+	str := iter.ReadString()
+	err := unmarshaler.UnmarshalText([]byte(str))
+	if err != nil {
+		iter.ReportError("textUnmarshalerDecoder", err.Error())
+	}
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_native.go b/vendor/github.com/json-iterator/go/reflect_native.go
new file mode 100644
index 000000000..9042eb0cb
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_native.go
@@ -0,0 +1,451 @@
+package jsoniter
+
+import (
+	"encoding/base64"
+	"reflect"
+	"strconv"
+	"unsafe"
+
+	"github.com/modern-go/reflect2"
+)
+
+const ptrSize = 32 << uintptr(^uintptr(0)>>63)
+
+func createEncoderOfNative(ctx *ctx, typ reflect2.Type) ValEncoder {
+	if typ.Kind() == reflect.Slice && typ.(reflect2.SliceType).Elem().Kind() == reflect.Uint8 {
+		sliceDecoder := decoderOfSlice(ctx, typ)
+		return &base64Codec{sliceDecoder: sliceDecoder}
+	}
+	typeName := typ.String()
+	kind := typ.Kind()
+	switch kind {
+	case reflect.String:
+		if typeName != "string" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*string)(nil)).Elem())
+		}
+		return &stringCodec{}
+	case reflect.Int:
+		if typeName != "int" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*int)(nil)).Elem())
+		}
+		if strconv.IntSize == 32 {
+			return &int32Codec{}
+		}
+		return &int64Codec{}
+	case reflect.Int8:
+		if typeName != "int8" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*int8)(nil)).Elem())
+		}
+		return &int8Codec{}
+	case reflect.Int16:
+		if typeName != "int16" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*int16)(nil)).Elem())
+		}
+		return &int16Codec{}
+	case reflect.Int32:
+		if typeName != "int32" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*int32)(nil)).Elem())
+		}
+		return &int32Codec{}
+	case reflect.Int64:
+		if typeName != "int64" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*int64)(nil)).Elem())
+		}
+		return &int64Codec{}
+	case reflect.Uint:
+		if typeName != "uint" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uint)(nil)).Elem())
+		}
+		if strconv.IntSize == 32 {
+			return &uint32Codec{}
+		}
+		return &uint64Codec{}
+	case reflect.Uint8:
+		if typeName != "uint8" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uint8)(nil)).Elem())
+		}
+		return &uint8Codec{}
+	case reflect.Uint16:
+		if typeName != "uint16" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uint16)(nil)).Elem())
+		}
+		return &uint16Codec{}
+	case reflect.Uint32:
+		if typeName != "uint32" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uint32)(nil)).Elem())
+		}
+		return &uint32Codec{}
+	case reflect.Uintptr:
+		if typeName != "uintptr" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uintptr)(nil)).Elem())
+		}
+		if ptrSize == 32 {
+			return &uint32Codec{}
+		}
+		return &uint64Codec{}
+	case reflect.Uint64:
+		if typeName != "uint64" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*uint64)(nil)).Elem())
+		}
+		return &uint64Codec{}
+	case reflect.Float32:
+		if typeName != "float32" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*float32)(nil)).Elem())
+		}
+		return &float32Codec{}
+	case reflect.Float64:
+		if typeName != "float64" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*float64)(nil)).Elem())
+		}
+		return &float64Codec{}
+	case reflect.Bool:
+		if typeName != "bool" {
+			return encoderOfType(ctx, reflect2.TypeOfPtr((*bool)(nil)).Elem())
+		}
+		return &boolCodec{}
+	}
+	return nil
+}
+
+func createDecoderOfNative(ctx *ctx, typ reflect2.Type) ValDecoder {
+	if typ.Kind() == reflect.Slice && typ.(reflect2.SliceType).Elem().Kind() == reflect.Uint8 {
+		sliceDecoder := decoderOfSlice(ctx, typ)
+		return &base64Codec{sliceDecoder: sliceDecoder}
+	}
+	typeName := typ.String()
+	switch typ.Kind() {
+	case reflect.String:
+		if typeName != "string" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*string)(nil)).Elem())
+		}
+		return &stringCodec{}
+	case reflect.Int:
+		if typeName != "int" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*int)(nil)).Elem())
+		}
+		if strconv.IntSize == 32 {
+			return &int32Codec{}
+		}
+		return &int64Codec{}
+	case reflect.Int8:
+		if typeName != "int8" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*int8)(nil)).Elem())
+		}
+		return &int8Codec{}
+	case reflect.Int16:
+		if typeName != "int16" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*int16)(nil)).Elem())
+		}
+		return &int16Codec{}
+	case reflect.Int32:
+		if typeName != "int32" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*int32)(nil)).Elem())
+		}
+		return &int32Codec{}
+	case reflect.Int64:
+		if typeName != "int64" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*int64)(nil)).Elem())
+		}
+		return &int64Codec{}
+	case reflect.Uint:
+		if typeName != "uint" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uint)(nil)).Elem())
+		}
+		if strconv.IntSize == 32 {
+			return &uint32Codec{}
+		}
+		return &uint64Codec{}
+	case reflect.Uint8:
+		if typeName != "uint8" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uint8)(nil)).Elem())
+		}
+		return &uint8Codec{}
+	case reflect.Uint16:
+		if typeName != "uint16" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uint16)(nil)).Elem())
+		}
+		return &uint16Codec{}
+	case reflect.Uint32:
+		if typeName != "uint32" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uint32)(nil)).Elem())
+		}
+		return &uint32Codec{}
+	case reflect.Uintptr:
+		if typeName != "uintptr" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uintptr)(nil)).Elem())
+		}
+		if ptrSize == 32 {
+			return &uint32Codec{}
+		}
+		return &uint64Codec{}
+	case reflect.Uint64:
+		if typeName != "uint64" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*uint64)(nil)).Elem())
+		}
+		return &uint64Codec{}
+	case reflect.Float32:
+		if typeName != "float32" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*float32)(nil)).Elem())
+		}
+		return &float32Codec{}
+	case reflect.Float64:
+		if typeName != "float64" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*float64)(nil)).Elem())
+		}
+		return &float64Codec{}
+	case reflect.Bool:
+		if typeName != "bool" {
+			return decoderOfType(ctx, reflect2.TypeOfPtr((*bool)(nil)).Elem())
+		}
+		return &boolCodec{}
+	}
+	return nil
+}
+
+type stringCodec struct {
+}
+
+func (codec *stringCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*string)(ptr)) = iter.ReadString()
+}
+
+func (codec *stringCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	str := *((*string)(ptr))
+	stream.WriteString(str)
+}
+
+func (codec *stringCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*string)(ptr)) == ""
+}
+
+type int8Codec struct {
+}
+
+func (codec *int8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*int8)(ptr)) = iter.ReadInt8()
+	}
+}
+
+func (codec *int8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt8(*((*int8)(ptr)))
+}
+
+func (codec *int8Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*int8)(ptr)) == 0
+}
+
+type int16Codec struct {
+}
+
+func (codec *int16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*int16)(ptr)) = iter.ReadInt16()
+	}
+}
+
+func (codec *int16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt16(*((*int16)(ptr)))
+}
+
+func (codec *int16Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*int16)(ptr)) == 0
+}
+
+type int32Codec struct {
+}
+
+func (codec *int32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*int32)(ptr)) = iter.ReadInt32()
+	}
+}
+
+func (codec *int32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt32(*((*int32)(ptr)))
+}
+
+func (codec *int32Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*int32)(ptr)) == 0
+}
+
+type int64Codec struct {
+}
+
+func (codec *int64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*int64)(ptr)) = iter.ReadInt64()
+	}
+}
+
+func (codec *int64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt64(*((*int64)(ptr)))
+}
+
+func (codec *int64Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*int64)(ptr)) == 0
+}
+
+type uint8Codec struct {
+}
+
+func (codec *uint8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*uint8)(ptr)) = iter.ReadUint8()
+	}
+}
+
+func (codec *uint8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint8(*((*uint8)(ptr)))
+}
+
+func (codec *uint8Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint8)(ptr)) == 0
+}
+
+type uint16Codec struct {
+}
+
+func (codec *uint16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*uint16)(ptr)) = iter.ReadUint16()
+	}
+}
+
+func (codec *uint16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint16(*((*uint16)(ptr)))
+}
+
+func (codec *uint16Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint16)(ptr)) == 0
+}
+
+type uint32Codec struct {
+}
+
+func (codec *uint32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*uint32)(ptr)) = iter.ReadUint32()
+	}
+}
+
+func (codec *uint32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint32(*((*uint32)(ptr)))
+}
+
+func (codec *uint32Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint32)(ptr)) == 0
+}
+
+type uint64Codec struct {
+}
+
+func (codec *uint64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*uint64)(ptr)) = iter.ReadUint64()
+	}
+}
+
+func (codec *uint64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint64(*((*uint64)(ptr)))
+}
+
+func (codec *uint64Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint64)(ptr)) == 0
+}
+
+type float32Codec struct {
+}
+
+func (codec *float32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*float32)(ptr)) = iter.ReadFloat32()
+	}
+}
+
+func (codec *float32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat32(*((*float32)(ptr)))
+}
+
+func (codec *float32Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*float32)(ptr)) == 0
+}
+
+type float64Codec struct {
+}
+
+func (codec *float64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*float64)(ptr)) = iter.ReadFloat64()
+	}
+}
+
+func (codec *float64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat64(*((*float64)(ptr)))
+}
+
+func (codec *float64Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*float64)(ptr)) == 0
+}
+
+type boolCodec struct {
+}
+
+func (codec *boolCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if !iter.ReadNil() {
+		*((*bool)(ptr)) = iter.ReadBool()
+	}
+}
+
+func (codec *boolCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteBool(*((*bool)(ptr)))
+}
+
+func (codec *boolCodec) IsEmpty(ptr unsafe.Pointer) bool {
+	return !(*((*bool)(ptr)))
+}
+
+type base64Codec struct {
+	sliceType    *reflect2.UnsafeSliceType
+	sliceDecoder ValDecoder
+}
+
+func (codec *base64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.ReadNil() {
+		codec.sliceType.UnsafeSetNil(ptr)
+		return
+	}
+	switch iter.WhatIsNext() {
+	case StringValue:
+		src := iter.ReadString()
+		dst, err := base64.StdEncoding.DecodeString(src)
+		if err != nil {
+			iter.ReportError("decode base64", err.Error())
+		} else {
+			codec.sliceType.UnsafeSet(ptr, unsafe.Pointer(&dst))
+		}
+	case ArrayValue:
+		codec.sliceDecoder.Decode(ptr, iter)
+	default:
+		iter.ReportError("base64Codec", "invalid input")
+	}
+}
+
+func (codec *base64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
+	src := *((*[]byte)(ptr))
+	if len(src) == 0 {
+		stream.WriteNil()
+		return
+	}
+	encoding := base64.StdEncoding
+	stream.writeByte('"')
+	size := encoding.EncodedLen(len(src))
+	buf := make([]byte, size)
+	encoding.Encode(buf, src)
+	stream.buf = append(stream.buf, buf...)
+	stream.writeByte('"')
+}
+
+func (codec *base64Codec) IsEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*[]byte)(ptr))) == 0
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_optional.go b/vendor/github.com/json-iterator/go/reflect_optional.go
new file mode 100644
index 000000000..43ec71d6d
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_optional.go
@@ -0,0 +1,133 @@
+package jsoniter
+
+import (
+	"github.com/modern-go/reflect2"
+	"reflect"
+	"unsafe"
+)
+
+func decoderOfOptional(ctx *ctx, typ reflect2.Type) ValDecoder {
+	ptrType := typ.(*reflect2.UnsafePtrType)
+	elemType := ptrType.Elem()
+	decoder := decoderOfType(ctx, elemType)
+	if ctx.prefix == "" && elemType.Kind() == reflect.Ptr {
+		return &dereferenceDecoder{elemType, decoder}
+	}
+	return &OptionalDecoder{elemType, decoder}
+}
+
+func encoderOfOptional(ctx *ctx, typ reflect2.Type) ValEncoder {
+	ptrType := typ.(*reflect2.UnsafePtrType)
+	elemType := ptrType.Elem()
+	elemEncoder := encoderOfType(ctx, elemType)
+	encoder := &OptionalEncoder{elemEncoder}
+	return encoder
+}
+
+type OptionalDecoder struct {
+	ValueType    reflect2.Type
+	ValueDecoder ValDecoder
+}
+
+func (decoder *OptionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.ReadNil() {
+		*((*unsafe.Pointer)(ptr)) = nil
+	} else {
+		if *((*unsafe.Pointer)(ptr)) == nil {
+			//pointer to null, we have to allocate memory to hold the value
+			newPtr := decoder.ValueType.UnsafeNew()
+			decoder.ValueDecoder.Decode(newPtr, iter)
+			*((*unsafe.Pointer)(ptr)) = newPtr
+		} else {
+			//reuse existing instance
+			decoder.ValueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
+		}
+	}
+}
+
+type dereferenceDecoder struct {
+	// only to deference a pointer
+	valueType    reflect2.Type
+	valueDecoder ValDecoder
+}
+
+func (decoder *dereferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		//pointer to null, we have to allocate memory to hold the value
+		newPtr := decoder.valueType.UnsafeNew()
+		decoder.valueDecoder.Decode(newPtr, iter)
+		*((*unsafe.Pointer)(ptr)) = newPtr
+	} else {
+		//reuse existing instance
+		decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
+	}
+}
+
+type OptionalEncoder struct {
+	ValueEncoder ValEncoder
+}
+
+func (encoder *OptionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *OptionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return *((*unsafe.Pointer)(ptr)) == nil
+}
+
+type dereferenceEncoder struct {
+	ValueEncoder ValEncoder
+}
+
+func (encoder *dereferenceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *dereferenceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	dePtr := *((*unsafe.Pointer)(ptr))
+	if dePtr == nil {
+		return true
+	}
+	return encoder.ValueEncoder.IsEmpty(dePtr)
+}
+
+func (encoder *dereferenceEncoder) IsEmbeddedPtrNil(ptr unsafe.Pointer) bool {
+	deReferenced := *((*unsafe.Pointer)(ptr))
+	if deReferenced == nil {
+		return true
+	}
+	isEmbeddedPtrNil, converted := encoder.ValueEncoder.(IsEmbeddedPtrNil)
+	if !converted {
+		return false
+	}
+	fieldPtr := unsafe.Pointer(deReferenced)
+	return isEmbeddedPtrNil.IsEmbeddedPtrNil(fieldPtr)
+}
+
+type referenceEncoder struct {
+	encoder ValEncoder
+}
+
+func (encoder *referenceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.encoder.Encode(unsafe.Pointer(&ptr), stream)
+}
+
+func (encoder *referenceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.encoder.IsEmpty(unsafe.Pointer(&ptr))
+}
+
+type referenceDecoder struct {
+	decoder ValDecoder
+}
+
+func (decoder *referenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.decoder.Decode(unsafe.Pointer(&ptr), iter)
+}
diff --git a/vendor/github.com/json-iterator/go/reflect_slice.go b/vendor/github.com/json-iterator/go/reflect_slice.go
new file mode 100644
index 000000000..9441d79df
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/reflect_slice.go
@@ -0,0 +1,99 @@
+package jsoniter
+
+import (
+	"fmt"
+	"github.com/modern-go/reflect2"
+	"io"
+	"unsafe"
+)
+
+func decoderOfSlice(ctx *ctx, typ reflect2.Type) ValDecoder {
+	sliceType := typ.(*reflect2.UnsafeSliceType)
+	decoder := decoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
+	return &sliceDecoder{sliceType, decoder}
+}
+
+func encoderOfSlice(ctx *ctx, typ reflect2.Type) ValEncoder {
+	sliceType := typ.(*reflect2.UnsafeSliceType)
+	encoder := encoderOfType(ctx.append("[sliceElem]"), sliceType.Elem())
+	return &sliceEncoder{sliceType, encoder}
+}
+
+type sliceEncoder struct {
+	sliceType   *reflect2.UnsafeSliceType
+	elemEncoder ValEncoder
+}
+
+func (encoder *sliceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if encoder.sliceType.UnsafeIsNil(ptr) {
+		stream.WriteNil()
+		return
+	}
+	length := encoder.sliceType.UnsafeLengthOf(ptr)
+	if length == 0 {
+		stream.WriteEmptyArray()
+		return
+	}
+	stream.WriteArrayStart()
+	encoder.elemEncoder.Encode(encoder.sliceType.UnsafeGetIndex(ptr, 0), stream)
+	for i := 1; i < length; i++ {
+		stream.WriteMore()
+		elemPtr := encoder.sliceType.UnsafeGetIndex(ptr, i)
+		encoder.elemEncoder.Encode(elemPtr, stream)
+	}
+	stream.WriteArrayEnd()
+	if stream.Error != nil && stream.Error != io.EOF {
+		stream.Error = fmt.Errorf("%v: %s", encoder.sliceType, stream.Error.Error())
+	}
+}
+
+func (encoder *sliceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.sliceType.UnsafeLengthOf(ptr) == 0
+}
+
+type sliceDecoder struct {
+	sliceType   *reflect2.UnsafeSliceType
+	elemDecoder ValDecoder
+}
+
+func (decoder *sliceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.doDecode(ptr, iter)
+	if iter.Error != nil && iter.Error != io.EOF {
+		iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error())
+	}
+}
+
+func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
+	c := iter.nextToken()
+	sliceType := decoder.sliceType
+	if c == 'n' {
+		iter.skipThreeBytes('u', 'l', 'l')
+		sliceType.UnsafeSetNil(ptr)
+		return
+	}
+	if c != '[' {
+		iter.ReportError("decode slice", "expect [ or n, but found "+string([]byte{c}))
+		return
+	}
+	c = iter.nextToken()
+	if c == ']' {
+		sliceType.UnsafeSet(ptr, sliceType.UnsafeMakeSlice(0, 0))
+		return
+	}
+	iter.unreadByte()
+	sliceType.UnsafeGrow(ptr, 1)
+	elemPtr := sliceType.UnsafeGetIndex(ptr, 0)
+	decoder.elemDecoder.Decode(elemPtr, iter)
+	length := 1
+	for c = iter.nextToken(); c == ','; c = iter.nextToken() {
+		idx := length
+		length += 1
+		sliceType.UnsafeGrow(ptr, length)
+		elemPtr = sliceType.UnsafeGetIndex(ptr, idx)
+		decoder.elemDecoder.Decode(elemPtr, iter)
+	}
+	if c != ']' {
+		iter.ReportError("decode slice", "expect ], but found "+string([]byte{c}))
+		return
+	}
+}
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_struct_decoder.go b/vendor/github.com/json-iterator/go/reflect_struct_decoder.go
index b3417fd73..355d2d116 100644
--- a/vendor/github.com/json-iterator/go/feature_reflect_struct_decoder.go
+++ b/vendor/github.com/json-iterator/go/reflect_struct_decoder.go
@@ -3,38 +3,78 @@ package jsoniter
 import (
 	"fmt"
 	"io"
-	"reflect"
 	"strings"
 	"unsafe"
+
+	"github.com/modern-go/reflect2"
 )
 
-func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder) (ValDecoder, error) {
-	knownHash := map[int32]struct{}{
+func decoderOfStruct(ctx *ctx, typ reflect2.Type) ValDecoder {
+	bindings := map[string]*Binding{}
+	structDescriptor := describeStruct(ctx, typ)
+	for _, binding := range structDescriptor.Fields {
+		for _, fromName := range binding.FromNames {
+			old := bindings[fromName]
+			if old == nil {
+				bindings[fromName] = binding
+				continue
+			}
+			ignoreOld, ignoreNew := resolveConflictBinding(ctx.frozenConfig, old, binding)
+			if ignoreOld {
+				delete(bindings, fromName)
+			}
+			if !ignoreNew {
+				bindings[fromName] = binding
+			}
+		}
+	}
+	fields := map[string]*structFieldDecoder{}
+	for k, binding := range bindings {
+		fields[k] = binding.Decoder.(*structFieldDecoder)
+	}
+
+	if !ctx.caseSensitive() {
+		for k, binding := range bindings {
+			if _, found := fields[strings.ToLower(k)]; !found {
+				fields[strings.ToLower(k)] = binding.Decoder.(*structFieldDecoder)
+			}
+		}
+	}
+
+	return createStructDecoder(ctx, typ, fields)
+}
+
+func createStructDecoder(ctx *ctx, typ reflect2.Type, fields map[string]*structFieldDecoder) ValDecoder {
+	if ctx.disallowUnknownFields {
+		return &generalStructDecoder{typ: typ, fields: fields, disallowUnknownFields: true}
+	}
+	knownHash := map[int64]struct{}{
 		0: {},
 	}
+
 	switch len(fields) {
 	case 0:
-		return &skipObjectDecoder{typ}, nil
+		return &skipObjectDecoder{typ}
 	case 1:
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
-			return &oneFieldStructDecoder{typ, fieldHash, fieldDecoder}, nil
+			return &oneFieldStructDecoder{typ, fieldHash, fieldDecoder}
 		}
 	case 2:
-		var fieldHash1 int32
-		var fieldHash2 int32
+		var fieldHash1 int64
+		var fieldHash2 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldHash1 == 0 {
@@ -45,19 +85,19 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 				fieldDecoder2 = fieldDecoder
 			}
 		}
-		return &twoFieldsStructDecoder{typ, fieldHash1, fieldDecoder1, fieldHash2, fieldDecoder2}, nil
+		return &twoFieldsStructDecoder{typ, fieldHash1, fieldDecoder1, fieldHash2, fieldDecoder2}
 	case 3:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -72,21 +112,23 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &threeFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3}
 	case 4:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
 		var fieldDecoder4 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -104,24 +146,26 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &fourFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4}
 	case 5:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
 		var fieldDecoder4 *structFieldDecoder
 		var fieldDecoder5 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -142,15 +186,18 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &fiveFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5}
 	case 6:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
-		var fieldName6 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
+		var fieldName6 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
@@ -158,10 +205,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 		var fieldDecoder5 *structFieldDecoder
 		var fieldDecoder6 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -185,16 +232,20 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &sixFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6}
 	case 7:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
-		var fieldName6 int32
-		var fieldName7 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
+		var fieldName6 int64
+		var fieldName7 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
@@ -203,10 +254,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 		var fieldDecoder6 *structFieldDecoder
 		var fieldDecoder7 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -233,18 +284,22 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &sevenFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7}
 	case 8:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
-		var fieldName6 int32
-		var fieldName7 int32
-		var fieldName8 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
+		var fieldName6 int64
+		var fieldName7 int64
+		var fieldName8 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
@@ -254,10 +309,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 		var fieldDecoder7 *structFieldDecoder
 		var fieldDecoder8 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -287,19 +342,24 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &eightFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8}
 	case 9:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
-		var fieldName6 int32
-		var fieldName7 int32
-		var fieldName8 int32
-		var fieldName9 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
+		var fieldName6 int64
+		var fieldName7 int64
+		var fieldName8 int64
+		var fieldName9 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
@@ -310,10 +370,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 		var fieldDecoder8 *structFieldDecoder
 		var fieldDecoder9 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -346,20 +406,26 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &nineFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8, fieldName9, fieldDecoder9}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8,
+			fieldName9, fieldDecoder9}
 	case 10:
-		var fieldName1 int32
-		var fieldName2 int32
-		var fieldName3 int32
-		var fieldName4 int32
-		var fieldName5 int32
-		var fieldName6 int32
-		var fieldName7 int32
-		var fieldName8 int32
-		var fieldName9 int32
-		var fieldName10 int32
+		var fieldName1 int64
+		var fieldName2 int64
+		var fieldName3 int64
+		var fieldName4 int64
+		var fieldName5 int64
+		var fieldName6 int64
+		var fieldName7 int64
+		var fieldName8 int64
+		var fieldName9 int64
+		var fieldName10 int64
 		var fieldDecoder1 *structFieldDecoder
 		var fieldDecoder2 *structFieldDecoder
 		var fieldDecoder3 *structFieldDecoder
@@ -371,10 +437,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 		var fieldDecoder9 *structFieldDecoder
 		var fieldDecoder10 *structFieldDecoder
 		for fieldName, fieldDecoder := range fields {
-			fieldHash := calcHash(fieldName)
+			fieldHash := calcHash(fieldName, ctx.caseSensitive())
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields, false}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -410,48 +476,80 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &tenFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8, fieldName9, fieldDecoder9,
-			fieldName10, fieldDecoder10}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8,
+			fieldName9, fieldDecoder9,
+			fieldName10, fieldDecoder10}
 	}
-	return &generalStructDecoder{typ, fields}, nil
+	return &generalStructDecoder{typ, fields, false}
 }
 
 type generalStructDecoder struct {
-	typ    reflect.Type
-	fields map[string]*structFieldDecoder
+	typ                   reflect2.Type
+	fields                map[string]*structFieldDecoder
+	disallowUnknownFields bool
 }
 
 func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	if !iter.readObjectStart() {
 		return
 	}
-	fieldBytes := iter.readObjectFieldAsBytes()
-	field := *(*string)(unsafe.Pointer(&fieldBytes))
-	fieldDecoder := decoder.fields[strings.ToLower(field)]
-	if fieldDecoder == nil {
-		iter.Skip()
-	} else {
-		fieldDecoder.Decode(ptr, iter)
+	var c byte
+	for c = ','; c == ','; c = iter.nextToken() {
+		decoder.decodeOneField(ptr, iter)
 	}
-	for iter.nextToken() == ',' {
-		fieldBytes = iter.readObjectFieldAsBytes()
+	if iter.Error != nil && iter.Error != io.EOF {
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
+	}
+	if c != '}' {
+		iter.ReportError("struct Decode", `expect }, but found `+string([]byte{c}))
+	}
+}
+
+func (decoder *generalStructDecoder) decodeOneField(ptr unsafe.Pointer, iter *Iterator) {
+	var field string
+	var fieldDecoder *structFieldDecoder
+	if iter.cfg.objectFieldMustBeSimpleString {
+		fieldBytes := iter.ReadStringAsSlice()
 		field = *(*string)(unsafe.Pointer(&fieldBytes))
-		fieldDecoder = decoder.fields[strings.ToLower(field)]
-		if fieldDecoder == nil {
-			iter.Skip()
-		} else {
-			fieldDecoder.Decode(ptr, iter)
+		fieldDecoder = decoder.fields[field]
+		if fieldDecoder == nil && !iter.cfg.caseSensitive {
+			fieldDecoder = decoder.fields[strings.ToLower(field)]
+		}
+	} else {
+		field = iter.ReadString()
+		fieldDecoder = decoder.fields[field]
+		if fieldDecoder == nil && !iter.cfg.caseSensitive {
+			fieldDecoder = decoder.fields[strings.ToLower(field)]
 		}
 	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+	if fieldDecoder == nil {
+		msg := "found unknown field: " + field
+		if decoder.disallowUnknownFields {
+			iter.ReportError("ReadObject", msg)
+		}
+		c := iter.nextToken()
+		if c != ':' {
+			iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+		}
+		iter.Skip()
+		return
 	}
+	c := iter.nextToken()
+	if c != ':' {
+		iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+	}
+	fieldDecoder.Decode(ptr, iter)
 }
 
 type skipObjectDecoder struct {
-	typ reflect.Type
+	typ reflect2.Type
 }
 
 func (decoder *skipObjectDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
@@ -464,8 +562,8 @@ func (decoder *skipObjectDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 }
 
 type oneFieldStructDecoder struct {
-	typ          reflect.Type
-	fieldHash    int32
+	typ          reflect2.Type
+	fieldHash    int64
 	fieldDecoder *structFieldDecoder
 }
 
@@ -484,15 +582,15 @@ func (decoder *oneFieldStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type twoFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
 }
 
@@ -514,17 +612,17 @@ func (decoder *twoFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type threeFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
 }
 
@@ -548,19 +646,19 @@ func (decoder *threeFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type fourFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
 }
 
@@ -586,21 +684,21 @@ func (decoder *fourFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type fiveFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
-	fieldHash5    int32
+	fieldHash5    int64
 	fieldDecoder5 *structFieldDecoder
 }
 
@@ -628,23 +726,23 @@ func (decoder *fiveFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type sixFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
-	fieldHash5    int32
+	fieldHash5    int64
 	fieldDecoder5 *structFieldDecoder
-	fieldHash6    int32
+	fieldHash6    int64
 	fieldDecoder6 *structFieldDecoder
 }
 
@@ -674,25 +772,25 @@ func (decoder *sixFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type sevenFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
-	fieldHash5    int32
+	fieldHash5    int64
 	fieldDecoder5 *structFieldDecoder
-	fieldHash6    int32
+	fieldHash6    int64
 	fieldDecoder6 *structFieldDecoder
-	fieldHash7    int32
+	fieldHash7    int64
 	fieldDecoder7 *structFieldDecoder
 }
 
@@ -724,27 +822,27 @@ func (decoder *sevenFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type eightFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
-	fieldHash5    int32
+	fieldHash5    int64
 	fieldDecoder5 *structFieldDecoder
-	fieldHash6    int32
+	fieldHash6    int64
 	fieldDecoder6 *structFieldDecoder
-	fieldHash7    int32
+	fieldHash7    int64
 	fieldDecoder7 *structFieldDecoder
-	fieldHash8    int32
+	fieldHash8    int64
 	fieldDecoder8 *structFieldDecoder
 }
 
@@ -778,29 +876,29 @@ func (decoder *eightFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type nineFieldsStructDecoder struct {
-	typ           reflect.Type
-	fieldHash1    int32
+	typ           reflect2.Type
+	fieldHash1    int64
 	fieldDecoder1 *structFieldDecoder
-	fieldHash2    int32
+	fieldHash2    int64
 	fieldDecoder2 *structFieldDecoder
-	fieldHash3    int32
+	fieldHash3    int64
 	fieldDecoder3 *structFieldDecoder
-	fieldHash4    int32
+	fieldHash4    int64
 	fieldDecoder4 *structFieldDecoder
-	fieldHash5    int32
+	fieldHash5    int64
 	fieldDecoder5 *structFieldDecoder
-	fieldHash6    int32
+	fieldHash6    int64
 	fieldDecoder6 *structFieldDecoder
-	fieldHash7    int32
+	fieldHash7    int64
 	fieldDecoder7 *structFieldDecoder
-	fieldHash8    int32
+	fieldHash8    int64
 	fieldDecoder8 *structFieldDecoder
-	fieldHash9    int32
+	fieldHash9    int64
 	fieldDecoder9 *structFieldDecoder
 }
 
@@ -836,31 +934,31 @@ func (decoder *nineFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type tenFieldsStructDecoder struct {
-	typ            reflect.Type
-	fieldHash1     int32
+	typ            reflect2.Type
+	fieldHash1     int64
 	fieldDecoder1  *structFieldDecoder
-	fieldHash2     int32
+	fieldHash2     int64
 	fieldDecoder2  *structFieldDecoder
-	fieldHash3     int32
+	fieldHash3     int64
 	fieldDecoder3  *structFieldDecoder
-	fieldHash4     int32
+	fieldHash4     int64
 	fieldDecoder4  *structFieldDecoder
-	fieldHash5     int32
+	fieldHash5     int64
 	fieldDecoder5  *structFieldDecoder
-	fieldHash6     int32
+	fieldHash6     int64
 	fieldDecoder6  *structFieldDecoder
-	fieldHash7     int32
+	fieldHash7     int64
 	fieldDecoder7  *structFieldDecoder
-	fieldHash8     int32
+	fieldHash8     int64
 	fieldDecoder8  *structFieldDecoder
-	fieldHash9     int32
+	fieldHash9     int64
 	fieldDecoder9  *structFieldDecoder
-	fieldHash10    int32
+	fieldHash10    int64
 	fieldDecoder10 *structFieldDecoder
 }
 
@@ -898,19 +996,53 @@ func (decoder *tenFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
 type structFieldDecoder struct {
-	field        *reflect.StructField
+	field        reflect2.StructField
 	fieldDecoder ValDecoder
 }
 
 func (decoder *structFieldDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	fieldPtr := unsafe.Pointer(uintptr(ptr) + decoder.field.Offset)
+	fieldPtr := decoder.field.UnsafeGet(ptr)
 	decoder.fieldDecoder.Decode(fieldPtr, iter)
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%s: %s", decoder.field.Name, iter.Error.Error())
+		iter.Error = fmt.Errorf("%s: %s", decoder.field.Name(), iter.Error.Error())
+	}
+}
+
+type stringModeStringDecoder struct {
+	elemDecoder ValDecoder
+	cfg         *frozenConfig
+}
+
+func (decoder *stringModeStringDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.elemDecoder.Decode(ptr, iter)
+	str := *((*string)(ptr))
+	tempIter := decoder.cfg.BorrowIterator([]byte(str))
+	defer decoder.cfg.ReturnIterator(tempIter)
+	*((*string)(ptr)) = tempIter.ReadString()
+}
+
+type stringModeNumberDecoder struct {
+	elemDecoder ValDecoder
+}
+
+func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	c := iter.nextToken()
+	if c != '"' {
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
+		return
+	}
+	decoder.elemDecoder.Decode(ptr, iter)
+	if iter.Error != nil {
+		return
+	}
+	c = iter.readByte()
+	if c != '"' {
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
+		return
 	}
 }
diff --git a/vendor/github.com/json-iterator/go/feature_reflect_object.go b/vendor/github.com/json-iterator/go/reflect_struct_encoder.go
index 59b1235c0..d0759cf64 100644
--- a/vendor/github.com/json-iterator/go/feature_reflect_object.go
+++ b/vendor/github.com/json-iterator/go/reflect_struct_encoder.go
@@ -2,23 +2,20 @@ package jsoniter
 
 import (
 	"fmt"
+	"github.com/modern-go/reflect2"
 	"io"
 	"reflect"
-	"strings"
 	"unsafe"
 )
 
-func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
+func encoderOfStruct(ctx *ctx, typ reflect2.Type) ValEncoder {
 	type bindingTo struct {
 		binding *Binding
 		toName  string
 		ignored bool
 	}
 	orderedBindings := []*bindingTo{}
-	structDescriptor, err := describeStruct(cfg, typ)
-	if err != nil {
-		return nil, err
-	}
+	structDescriptor := describeStruct(ctx, typ)
 	for _, binding := range structDescriptor.Fields {
 		for _, toName := range binding.ToNames {
 			new := &bindingTo{
@@ -29,13 +26,13 @@ func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 				if old.toName != toName {
 					continue
 				}
-				old.ignored, new.ignored = resolveConflictBinding(cfg, old.binding, new.binding)
+				old.ignored, new.ignored = resolveConflictBinding(ctx.frozenConfig, old.binding, new.binding)
 			}
 			orderedBindings = append(orderedBindings, new)
 		}
 	}
 	if len(orderedBindings) == 0 {
-		return &emptyStructEncoder{}, nil
+		return &emptyStructEncoder{}
 	}
 	finalOrderedFields := []structFieldTo{}
 	for _, bindingTo := range orderedBindings {
@@ -46,12 +43,36 @@ func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 			})
 		}
 	}
-	return &structEncoder{structDescriptor.onePtrEmbedded, structDescriptor.onePtrOptimization, finalOrderedFields}, nil
+	return &structEncoder{typ, finalOrderedFields}
+}
+
+func createCheckIsEmpty(ctx *ctx, typ reflect2.Type) checkIsEmpty {
+	encoder := createEncoderOfNative(ctx, typ)
+	if encoder != nil {
+		return encoder
+	}
+	kind := typ.Kind()
+	switch kind {
+	case reflect.Interface:
+		return &dynamicEncoder{typ}
+	case reflect.Struct:
+		return &structEncoder{typ: typ}
+	case reflect.Array:
+		return &arrayEncoder{}
+	case reflect.Slice:
+		return &sliceEncoder{}
+	case reflect.Map:
+		return encoderOfMap(ctx, typ)
+	case reflect.Ptr:
+		return &OptionalEncoder{}
+	default:
+		return &lazyErrorEncoder{err: fmt.Errorf("unsupported type: %v", typ)}
+	}
 }
 
 func resolveConflictBinding(cfg *frozenConfig, old, new *Binding) (ignoreOld, ignoreNew bool) {
-	newTagged := new.Field.Tag.Get(cfg.getTagKey()) != ""
-	oldTagged := old.Field.Tag.Get(cfg.getTagKey()) != ""
+	newTagged := new.Field.Tag().Get(cfg.getTagKey()) != ""
+	oldTagged := old.Field.Tag().Get(cfg.getTagKey()) != ""
 	if newTagged {
 		if oldTagged {
 			if len(old.levels) > len(new.levels) {
@@ -78,62 +99,41 @@ func resolveConflictBinding(cfg *frozenConfig, old, new *Binding) (ignoreOld, ig
 	}
 }
 
-func decoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	bindings := map[string]*Binding{}
-	structDescriptor, err := describeStruct(cfg, typ)
-	if err != nil {
-		return nil, err
-	}
-	for _, binding := range structDescriptor.Fields {
-		for _, fromName := range binding.FromNames {
-			old := bindings[fromName]
-			if old == nil {
-				bindings[fromName] = binding
-				continue
-			}
-			ignoreOld, ignoreNew := resolveConflictBinding(cfg, old, binding)
-			if ignoreOld {
-				delete(bindings, fromName)
-			}
-			if !ignoreNew {
-				bindings[fromName] = binding
-			}
-		}
-	}
-	fields := map[string]*structFieldDecoder{}
-	for k, binding := range bindings {
-		fields[strings.ToLower(k)] = binding.Decoder.(*structFieldDecoder)
-	}
-	return createStructDecoder(typ, fields)
-}
-
 type structFieldEncoder struct {
-	field        *reflect.StructField
+	field        reflect2.StructField
 	fieldEncoder ValEncoder
 	omitempty    bool
 }
 
 func (encoder *structFieldEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
-	fieldPtr := unsafe.Pointer(uintptr(ptr) + encoder.field.Offset)
+	fieldPtr := encoder.field.UnsafeGet(ptr)
 	encoder.fieldEncoder.Encode(fieldPtr, stream)
 	if stream.Error != nil && stream.Error != io.EOF {
-		stream.Error = fmt.Errorf("%s: %s", encoder.field.Name, stream.Error.Error())
+		stream.Error = fmt.Errorf("%s: %s", encoder.field.Name(), stream.Error.Error())
 	}
 }
 
-func (encoder *structFieldEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
 func (encoder *structFieldEncoder) IsEmpty(ptr unsafe.Pointer) bool {
-	fieldPtr := unsafe.Pointer(uintptr(ptr) + encoder.field.Offset)
+	fieldPtr := encoder.field.UnsafeGet(ptr)
 	return encoder.fieldEncoder.IsEmpty(fieldPtr)
 }
 
+func (encoder *structFieldEncoder) IsEmbeddedPtrNil(ptr unsafe.Pointer) bool {
+	isEmbeddedPtrNil, converted := encoder.fieldEncoder.(IsEmbeddedPtrNil)
+	if !converted {
+		return false
+	}
+	fieldPtr := encoder.field.UnsafeGet(ptr)
+	return isEmbeddedPtrNil.IsEmbeddedPtrNil(fieldPtr)
+}
+
+type IsEmbeddedPtrNil interface {
+	IsEmbeddedPtrNil(ptr unsafe.Pointer) bool
+}
+
 type structEncoder struct {
-	onePtrEmbedded     bool
-	onePtrOptimization bool
-	fields             []structFieldTo
+	typ    reflect2.Type
+	fields []structFieldTo
 }
 
 type structFieldTo struct {
@@ -148,6 +148,9 @@ func (encoder *structEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 		if field.encoder.omitempty && field.encoder.IsEmpty(ptr) {
 			continue
 		}
+		if field.encoder.IsEmbeddedPtrNil(ptr) {
+			continue
+		}
 		if isNotFirst {
 			stream.WriteMore()
 		}
@@ -156,23 +159,8 @@ func (encoder *structEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 		isNotFirst = true
 	}
 	stream.WriteObjectEnd()
-}
-
-func (encoder *structEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	e := (*emptyInterface)(unsafe.Pointer(&val))
-	if encoder.onePtrOptimization {
-		if e.word == nil && encoder.onePtrEmbedded {
-			stream.WriteObjectStart()
-			stream.WriteObjectEnd()
-			return
-		}
-		ptr := uintptr(e.word)
-		e.word = unsafe.Pointer(&ptr)
-	}
-	if reflect.TypeOf(val).Kind() == reflect.Ptr {
-		encoder.Encode(unsafe.Pointer(&e.word), stream)
-	} else {
-		encoder.Encode(e.word, stream)
+	if stream.Error != nil && stream.Error != io.EOF {
+		stream.Error = fmt.Errorf("%v.%s", encoder.typ, stream.Error.Error())
 	}
 }
 
@@ -187,10 +175,36 @@ func (encoder *emptyStructEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteEmptyObject()
 }
 
-func (encoder *emptyStructEncoder) EncodeInterface(val interface{}, stream *Stream) {
-	WriteToStream(val, stream, encoder)
-}
-
 func (encoder *emptyStructEncoder) IsEmpty(ptr unsafe.Pointer) bool {
 	return false
 }
+
+type stringModeNumberEncoder struct {
+	elemEncoder ValEncoder
+}
+
+func (encoder *stringModeNumberEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.writeByte('"')
+	encoder.elemEncoder.Encode(ptr, stream)
+	stream.writeByte('"')
+}
+
+func (encoder *stringModeNumberEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.elemEncoder.IsEmpty(ptr)
+}
+
+type stringModeStringEncoder struct {
+	elemEncoder ValEncoder
+	cfg         *frozenConfig
+}
+
+func (encoder *stringModeStringEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	tempStream := encoder.cfg.BorrowStream(nil)
+	defer encoder.cfg.ReturnStream(tempStream)
+	encoder.elemEncoder.Encode(ptr, tempStream)
+	stream.WriteString(string(tempStream.Buffer()))
+}
+
+func (encoder *stringModeStringEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.elemEncoder.IsEmpty(ptr)
+}
diff --git a/vendor/github.com/json-iterator/go/feature_stream.go b/vendor/github.com/json-iterator/go/stream.go
index 9c8470a03..17662fded 100644
--- a/vendor/github.com/json-iterator/go/feature_stream.go
+++ b/vendor/github.com/json-iterator/go/stream.go
@@ -4,15 +4,15 @@ import (
 	"io"
 )
 
-// Stream is a io.Writer like object, with JSON specific write functions.
+// stream is a io.Writer like object, with JSON specific write functions.
 // Error is not returned as return value, but stored as Error member on this stream instance.
 type Stream struct {
-	cfg       *frozenConfig
-	out       io.Writer
-	buf       []byte
-	n         int
-	Error     error
-	indention int
+	cfg        *frozenConfig
+	out        io.Writer
+	buf        []byte
+	Error      error
+	indention  int
+	Attachment interface{} // open for customized encoder
 }
 
 // NewStream create new stream instance.
@@ -23,8 +23,7 @@ func NewStream(cfg API, out io.Writer, bufSize int) *Stream {
 	return &Stream{
 		cfg:       cfg.(*frozenConfig),
 		out:       out,
-		buf:       make([]byte, bufSize),
-		n:         0,
+		buf:       make([]byte, 0, bufSize),
 		Error:     nil,
 		indention: 0,
 	}
@@ -38,22 +37,27 @@ func (stream *Stream) Pool() StreamPool {
 // Reset reuse this stream instance by assign a new writer
 func (stream *Stream) Reset(out io.Writer) {
 	stream.out = out
-	stream.n = 0
+	stream.buf = stream.buf[:0]
 }
 
 // Available returns how many bytes are unused in the buffer.
 func (stream *Stream) Available() int {
-	return len(stream.buf) - stream.n
+	return cap(stream.buf) - len(stream.buf)
 }
 
 // Buffered returns the number of bytes that have been written into the current buffer.
 func (stream *Stream) Buffered() int {
-	return stream.n
+	return len(stream.buf)
 }
 
 // Buffer if writer is nil, use this method to take the result
 func (stream *Stream) Buffer() []byte {
-	return stream.buf[:stream.n]
+	return stream.buf
+}
+
+// SetBuffer allows to append to the internal buffer directly
+func (stream *Stream) SetBuffer(buf []byte) {
+	stream.buf = buf
 }
 
 // Write writes the contents of p into the buffer.
@@ -61,97 +65,34 @@ func (stream *Stream) Buffer() []byte {
 // If nn < len(p), it also returns an error explaining
 // why the write is short.
 func (stream *Stream) Write(p []byte) (nn int, err error) {
-	for len(p) > stream.Available() && stream.Error == nil {
-		if stream.out == nil {
-			stream.growAtLeast(len(p))
-		} else {
-			var n int
-			if stream.Buffered() == 0 {
-				// Large write, empty buffer.
-				// Write directly from p to avoid copy.
-				n, stream.Error = stream.out.Write(p)
-			} else {
-				n = copy(stream.buf[stream.n:], p)
-				stream.n += n
-				stream.Flush()
-			}
-			nn += n
-			p = p[n:]
-		}
-	}
-	if stream.Error != nil {
-		return nn, stream.Error
+	stream.buf = append(stream.buf, p...)
+	if stream.out != nil {
+		nn, err = stream.out.Write(stream.buf)
+		stream.buf = stream.buf[nn:]
+		return
 	}
-	n := copy(stream.buf[stream.n:], p)
-	stream.n += n
-	nn += n
-	return nn, nil
+	return len(p), nil
 }
 
 // WriteByte writes a single byte.
 func (stream *Stream) writeByte(c byte) {
-	if stream.Error != nil {
-		return
-	}
-	if stream.Available() < 1 {
-		stream.growAtLeast(1)
-	}
-	stream.buf[stream.n] = c
-	stream.n++
+	stream.buf = append(stream.buf, c)
 }
 
 func (stream *Stream) writeTwoBytes(c1 byte, c2 byte) {
-	if stream.Error != nil {
-		return
-	}
-	if stream.Available() < 2 {
-		stream.growAtLeast(2)
-	}
-	stream.buf[stream.n] = c1
-	stream.buf[stream.n+1] = c2
-	stream.n += 2
+	stream.buf = append(stream.buf, c1, c2)
 }
 
 func (stream *Stream) writeThreeBytes(c1 byte, c2 byte, c3 byte) {
-	if stream.Error != nil {
-		return
-	}
-	if stream.Available() < 3 {
-		stream.growAtLeast(3)
-	}
-	stream.buf[stream.n] = c1
-	stream.buf[stream.n+1] = c2
-	stream.buf[stream.n+2] = c3
-	stream.n += 3
+	stream.buf = append(stream.buf, c1, c2, c3)
 }
 
 func (stream *Stream) writeFourBytes(c1 byte, c2 byte, c3 byte, c4 byte) {
-	if stream.Error != nil {
-		return
-	}
-	if stream.Available() < 4 {
-		stream.growAtLeast(4)
-	}
-	stream.buf[stream.n] = c1
-	stream.buf[stream.n+1] = c2
-	stream.buf[stream.n+2] = c3
-	stream.buf[stream.n+3] = c4
-	stream.n += 4
+	stream.buf = append(stream.buf, c1, c2, c3, c4)
 }
 
 func (stream *Stream) writeFiveBytes(c1 byte, c2 byte, c3 byte, c4 byte, c5 byte) {
-	if stream.Error != nil {
-		return
-	}
-	if stream.Available() < 5 {
-		stream.growAtLeast(5)
-	}
-	stream.buf[stream.n] = c1
-	stream.buf[stream.n+1] = c2
-	stream.buf[stream.n+2] = c3
-	stream.buf[stream.n+3] = c4
-	stream.buf[stream.n+4] = c5
-	stream.n += 5
+	stream.buf = append(stream.buf, c1, c2, c3, c4, c5)
 }
 
 // Flush writes any buffered data to the underlying io.Writer.
@@ -162,53 +103,20 @@ func (stream *Stream) Flush() error {
 	if stream.Error != nil {
 		return stream.Error
 	}
-	if stream.n == 0 {
-		return nil
-	}
-	n, err := stream.out.Write(stream.buf[0:stream.n])
-	if n < stream.n && err == nil {
-		err = io.ErrShortWrite
-	}
+	n, err := stream.out.Write(stream.buf)
 	if err != nil {
-		if n > 0 && n < stream.n {
-			copy(stream.buf[0:stream.n-n], stream.buf[n:stream.n])
+		if stream.Error == nil {
+			stream.Error = err
 		}
-		stream.n -= n
-		stream.Error = err
 		return err
 	}
-	stream.n = 0
+	stream.buf = stream.buf[n:]
 	return nil
 }
 
-func (stream *Stream) ensure(minimal int) {
-	available := stream.Available()
-	if available < minimal {
-		stream.growAtLeast(minimal)
-	}
-}
-
-func (stream *Stream) growAtLeast(minimal int) {
-	if stream.out != nil {
-		stream.Flush()
-	}
-	toGrow := len(stream.buf)
-	if toGrow < minimal {
-		toGrow = minimal
-	}
-	newBuf := make([]byte, len(stream.buf)+toGrow)
-	copy(newBuf, stream.Buffer())
-	stream.buf = newBuf
-}
-
 // WriteRaw write string out without quotes, just like []byte
 func (stream *Stream) WriteRaw(s string) {
-	stream.ensure(len(s))
-	if stream.Error != nil {
-		return
-	}
-	n := copy(stream.buf[stream.n:], s)
-	stream.n += n
+	stream.buf = append(stream.buf, s...)
 }
 
 // WriteNil write null to stream
@@ -269,6 +177,7 @@ func (stream *Stream) WriteEmptyObject() {
 func (stream *Stream) WriteMore() {
 	stream.writeByte(',')
 	stream.writeIndention(0)
+	stream.Flush()
 }
 
 // WriteArrayStart write [ with possible indention
@@ -280,8 +189,7 @@ func (stream *Stream) WriteArrayStart() {
 
 // WriteEmptyArray write []
 func (stream *Stream) WriteEmptyArray() {
-	stream.writeByte('[')
-	stream.writeByte(']')
+	stream.writeTwoBytes('[', ']')
 }
 
 // WriteArrayEnd write ] with possible indention
@@ -297,9 +205,7 @@ func (stream *Stream) writeIndention(delta int) {
 	}
 	stream.writeByte('\n')
 	toWrite := stream.indention - delta
-	stream.ensure(toWrite)
-	for i := 0; i < toWrite && stream.n < len(stream.buf); i++ {
-		stream.buf[stream.n] = ' '
-		stream.n++
+	for i := 0; i < toWrite; i++ {
+		stream.buf = append(stream.buf, ' ')
 	}
 }
diff --git a/vendor/github.com/json-iterator/go/feature_stream_float.go b/vendor/github.com/json-iterator/go/stream_float.go
index 9a404e11d..f318d2c59 100644
--- a/vendor/github.com/json-iterator/go/feature_stream_float.go
+++ b/vendor/github.com/json-iterator/go/stream_float.go
@@ -21,7 +21,7 @@ func (stream *Stream) WriteFloat32(val float32) {
 			fmt = 'e'
 		}
 	}
-	stream.WriteRaw(strconv.FormatFloat(float64(val), fmt, -1, 32))
+	stream.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 32)
 }
 
 // WriteFloat32Lossy write float32 to stream with ONLY 6 digits precision although much much faster
@@ -43,13 +43,12 @@ func (stream *Stream) WriteFloat32Lossy(val float32) {
 		return
 	}
 	stream.writeByte('.')
-	stream.ensure(10)
 	for p := precision - 1; p > 0 && fval < pow10[p]; p-- {
 		stream.writeByte('0')
 	}
 	stream.WriteUint64(fval)
-	for stream.buf[stream.n-1] == '0' {
-		stream.n--
+	for stream.buf[len(stream.buf)-1] == '0' {
+		stream.buf = stream.buf[:len(stream.buf)-1]
 	}
 }
 
@@ -63,7 +62,7 @@ func (stream *Stream) WriteFloat64(val float64) {
 			fmt = 'e'
 		}
 	}
-	stream.WriteRaw(strconv.FormatFloat(float64(val), fmt, -1, 64))
+	stream.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 64)
 }
 
 // WriteFloat64Lossy write float64 to stream with ONLY 6 digits precision although much much faster
@@ -85,12 +84,11 @@ func (stream *Stream) WriteFloat64Lossy(val float64) {
 		return
 	}
 	stream.writeByte('.')
-	stream.ensure(10)
 	for p := precision - 1; p > 0 && fval < pow10[p]; p-- {
 		stream.writeByte('0')
 	}
 	stream.WriteUint64(fval)
-	for stream.buf[stream.n-1] == '0' {
-		stream.n--
+	for stream.buf[len(stream.buf)-1] == '0' {
+		stream.buf = stream.buf[:len(stream.buf)-1]
 	}
 }
diff --git a/vendor/github.com/json-iterator/go/stream_int.go b/vendor/github.com/json-iterator/go/stream_int.go
new file mode 100644
index 000000000..d1059ee4c
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/stream_int.go
@@ -0,0 +1,190 @@
+package jsoniter
+
+var digits []uint32
+
+func init() {
+	digits = make([]uint32, 1000)
+	for i := uint32(0); i < 1000; i++ {
+		digits[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i%10 + '0'
+		if i < 10 {
+			digits[i] += 2 << 24
+		} else if i < 100 {
+			digits[i] += 1 << 24
+		}
+	}
+}
+
+func writeFirstBuf(space []byte, v uint32) []byte {
+	start := v >> 24
+	if start == 0 {
+		space = append(space, byte(v>>16), byte(v>>8))
+	} else if start == 1 {
+		space = append(space, byte(v>>8))
+	}
+	space = append(space, byte(v))
+	return space
+}
+
+func writeBuf(buf []byte, v uint32) []byte {
+	return append(buf, byte(v>>16), byte(v>>8), byte(v))
+}
+
+// WriteUint8 write uint8 to stream
+func (stream *Stream) WriteUint8(val uint8) {
+	stream.buf = writeFirstBuf(stream.buf, digits[val])
+}
+
+// WriteInt8 write int8 to stream
+func (stream *Stream) WriteInt8(nval int8) {
+	var val uint8
+	if nval < 0 {
+		val = uint8(-nval)
+		stream.buf = append(stream.buf, '-')
+	} else {
+		val = uint8(nval)
+	}
+	stream.buf = writeFirstBuf(stream.buf, digits[val])
+}
+
+// WriteUint16 write uint16 to stream
+func (stream *Stream) WriteUint16(val uint16) {
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[val])
+		return
+	}
+	r1 := val - q1*1000
+	stream.buf = writeFirstBuf(stream.buf, digits[q1])
+	stream.buf = writeBuf(stream.buf, digits[r1])
+	return
+}
+
+// WriteInt16 write int16 to stream
+func (stream *Stream) WriteInt16(nval int16) {
+	var val uint16
+	if nval < 0 {
+		val = uint16(-nval)
+		stream.buf = append(stream.buf, '-')
+	} else {
+		val = uint16(nval)
+	}
+	stream.WriteUint16(val)
+}
+
+// WriteUint32 write uint32 to stream
+func (stream *Stream) WriteUint32(val uint32) {
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[val])
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q1])
+		stream.buf = writeBuf(stream.buf, digits[r1])
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q2])
+	} else {
+		r3 := q2 - q3*1000
+		stream.buf = append(stream.buf, byte(q3+'0'))
+		stream.buf = writeBuf(stream.buf, digits[r3])
+	}
+	stream.buf = writeBuf(stream.buf, digits[r2])
+	stream.buf = writeBuf(stream.buf, digits[r1])
+}
+
+// WriteInt32 write int32 to stream
+func (stream *Stream) WriteInt32(nval int32) {
+	var val uint32
+	if nval < 0 {
+		val = uint32(-nval)
+		stream.buf = append(stream.buf, '-')
+	} else {
+		val = uint32(nval)
+	}
+	stream.WriteUint32(val)
+}
+
+// WriteUint64 write uint64 to stream
+func (stream *Stream) WriteUint64(val uint64) {
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[val])
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q1])
+		stream.buf = writeBuf(stream.buf, digits[r1])
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q2])
+		stream.buf = writeBuf(stream.buf, digits[r2])
+		stream.buf = writeBuf(stream.buf, digits[r1])
+		return
+	}
+	r3 := q2 - q3*1000
+	q4 := q3 / 1000
+	if q4 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q3])
+		stream.buf = writeBuf(stream.buf, digits[r3])
+		stream.buf = writeBuf(stream.buf, digits[r2])
+		stream.buf = writeBuf(stream.buf, digits[r1])
+		return
+	}
+	r4 := q3 - q4*1000
+	q5 := q4 / 1000
+	if q5 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q4])
+		stream.buf = writeBuf(stream.buf, digits[r4])
+		stream.buf = writeBuf(stream.buf, digits[r3])
+		stream.buf = writeBuf(stream.buf, digits[r2])
+		stream.buf = writeBuf(stream.buf, digits[r1])
+		return
+	}
+	r5 := q4 - q5*1000
+	q6 := q5 / 1000
+	if q6 == 0 {
+		stream.buf = writeFirstBuf(stream.buf, digits[q5])
+	} else {
+		stream.buf = writeFirstBuf(stream.buf, digits[q6])
+		r6 := q5 - q6*1000
+		stream.buf = writeBuf(stream.buf, digits[r6])
+	}
+	stream.buf = writeBuf(stream.buf, digits[r5])
+	stream.buf = writeBuf(stream.buf, digits[r4])
+	stream.buf = writeBuf(stream.buf, digits[r3])
+	stream.buf = writeBuf(stream.buf, digits[r2])
+	stream.buf = writeBuf(stream.buf, digits[r1])
+}
+
+// WriteInt64 write int64 to stream
+func (stream *Stream) WriteInt64(nval int64) {
+	var val uint64
+	if nval < 0 {
+		val = uint64(-nval)
+		stream.buf = append(stream.buf, '-')
+	} else {
+		val = uint64(nval)
+	}
+	stream.WriteUint64(val)
+}
+
+// WriteInt write int to stream
+func (stream *Stream) WriteInt(val int) {
+	stream.WriteInt64(int64(val))
+}
+
+// WriteUint write uint to stream
+func (stream *Stream) WriteUint(val uint) {
+	stream.WriteUint64(uint64(val))
+}
diff --git a/vendor/github.com/json-iterator/go/feature_stream_string.go b/vendor/github.com/json-iterator/go/stream_str.go
index 334282f05..54c2ba0b3 100644
--- a/vendor/github.com/json-iterator/go/feature_stream_string.go
+++ b/vendor/github.com/json-iterator/go/stream_str.go
@@ -219,34 +219,22 @@ var hex = "0123456789abcdef"
 
 // WriteStringWithHTMLEscaped write string to stream with html special characters escaped
 func (stream *Stream) WriteStringWithHTMLEscaped(s string) {
-	stream.ensure(32)
 	valLen := len(s)
-	toWriteLen := valLen
-	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
-	if stream.n+toWriteLen > bufLengthMinusTwo {
-		toWriteLen = bufLengthMinusTwo - stream.n
-	}
-	n := stream.n
-	stream.buf[n] = '"'
-	n++
+	stream.buf = append(stream.buf, '"')
 	// write string, the fast path, without utf8 and escape support
 	i := 0
-	for ; i < toWriteLen; i++ {
+	for ; i < valLen; i++ {
 		c := s[i]
 		if c < utf8.RuneSelf && htmlSafeSet[c] {
-			stream.buf[n] = c
-			n++
+			stream.buf = append(stream.buf, c)
 		} else {
 			break
 		}
 	}
 	if i == valLen {
-		stream.buf[n] = '"'
-		n++
-		stream.n = n
+		stream.buf = append(stream.buf, '"')
 		return
 	}
-	stream.n = n
 	writeStringSlowPathWithHTMLEscaped(stream, i, s, valLen)
 }
 
@@ -321,34 +309,22 @@ func writeStringSlowPathWithHTMLEscaped(stream *Stream, i int, s string, valLen
 
 // WriteString write string to stream without html escape
 func (stream *Stream) WriteString(s string) {
-	stream.ensure(32)
 	valLen := len(s)
-	toWriteLen := valLen
-	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
-	if stream.n+toWriteLen > bufLengthMinusTwo {
-		toWriteLen = bufLengthMinusTwo - stream.n
-	}
-	n := stream.n
-	stream.buf[n] = '"'
-	n++
+	stream.buf = append(stream.buf, '"')
 	// write string, the fast path, without utf8 and escape support
 	i := 0
-	for ; i < toWriteLen; i++ {
+	for ; i < valLen; i++ {
 		c := s[i]
 		if c > 31 && c != '"' && c != '\\' {
-			stream.buf[n] = c
-			n++
+			stream.buf = append(stream.buf, c)
 		} else {
 			break
 		}
 	}
 	if i == valLen {
-		stream.buf[n] = '"'
-		n++
-		stream.n = n
+		stream.buf = append(stream.buf, '"')
 		return
 	}
-	stream.n = n
 	writeStringSlowPath(stream, i, s, valLen)
 }
 
diff --git a/vendor/github.com/modern-go/concurrent/LICENSE b/vendor/github.com/modern-go/concurrent/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
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+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
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+      Contribution(s) alone or by combination of their Contribution(s)
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+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
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+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
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+
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+
+      (c) You must retain, in the Source form of any Derivative Works
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
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+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
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diff --git a/vendor/github.com/modern-go/concurrent/README.md b/vendor/github.com/modern-go/concurrent/README.md
new file mode 100644
index 000000000..acab3200a
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/README.md
@@ -0,0 +1,49 @@
+# concurrent
+
+[![Sourcegraph](https://sourcegraph.com/github.com/modern-go/concurrent/-/badge.svg)](https://sourcegraph.com/github.com/modern-go/concurrent?badge)
+[![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/modern-go/concurrent)
+[![Build Status](https://travis-ci.org/modern-go/concurrent.svg?branch=master)](https://travis-ci.org/modern-go/concurrent)
+[![codecov](https://codecov.io/gh/modern-go/concurrent/branch/master/graph/badge.svg)](https://codecov.io/gh/modern-go/concurrent)
+[![rcard](https://goreportcard.com/badge/github.com/modern-go/concurrent)](https://goreportcard.com/report/github.com/modern-go/concurrent)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://raw.githubusercontent.com/modern-go/concurrent/master/LICENSE)
+
+* concurrent.Map: backport sync.Map for go below 1.9
+* concurrent.Executor: goroutine with explicit ownership and cancellable
+
+# concurrent.Map
+
+because sync.Map is only available in go 1.9, we can use concurrent.Map to make code portable
+
+```go
+m := concurrent.NewMap()
+m.Store("hello", "world")
+elem, found := m.Load("hello")
+// elem will be "world"
+// found will be true
+```
+
+# concurrent.Executor
+
+```go
+executor := concurrent.NewUnboundedExecutor()
+executor.Go(func(ctx context.Context) {
+    everyMillisecond := time.NewTicker(time.Millisecond)
+    for {
+        select {
+        case <-ctx.Done():
+            fmt.Println("goroutine exited")
+            return
+        case <-everyMillisecond.C:
+            // do something
+        }
+    }
+})
+time.Sleep(time.Second)
+executor.StopAndWaitForever()
+fmt.Println("executor stopped")
+```
+
+attach goroutine to executor instance, so that we can
+
+* cancel it by stop the executor with Stop/StopAndWait/StopAndWaitForever
+* handle panic by callback: the default behavior will no longer crash your application
\ No newline at end of file
diff --git a/vendor/github.com/modern-go/concurrent/executor.go b/vendor/github.com/modern-go/concurrent/executor.go
new file mode 100644
index 000000000..623dba1ac
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/executor.go
@@ -0,0 +1,14 @@
+package concurrent
+
+import "context"
+
+// Executor replace go keyword to start a new goroutine
+// the goroutine should cancel itself if the context passed in has been cancelled
+// the goroutine started by the executor, is owned by the executor
+// we can cancel all executors owned by the executor just by stop the executor itself
+// however Executor interface does not Stop method, the one starting and owning executor
+// should use the concrete type of executor, instead of this interface.
+type Executor interface {
+	// Go starts a new goroutine controlled by the context
+	Go(handler func(ctx context.Context))
+}
diff --git a/vendor/github.com/modern-go/concurrent/go_above_19.go b/vendor/github.com/modern-go/concurrent/go_above_19.go
new file mode 100644
index 000000000..aeabf8c4f
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/go_above_19.go
@@ -0,0 +1,15 @@
+//+build go1.9
+
+package concurrent
+
+import "sync"
+
+// Map is a wrapper for sync.Map introduced in go1.9
+type Map struct {
+	sync.Map
+}
+
+// NewMap creates a thread safe Map
+func NewMap() *Map {
+	return &Map{}
+}
diff --git a/vendor/github.com/modern-go/concurrent/go_below_19.go b/vendor/github.com/modern-go/concurrent/go_below_19.go
new file mode 100644
index 000000000..b9c8df7f4
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/go_below_19.go
@@ -0,0 +1,33 @@
+//+build !go1.9
+
+package concurrent
+
+import "sync"
+
+// Map implements a thread safe map for go version below 1.9 using mutex
+type Map struct {
+	lock sync.RWMutex
+	data map[interface{}]interface{}
+}
+
+// NewMap creates a thread safe map
+func NewMap() *Map {
+	return &Map{
+		data: make(map[interface{}]interface{}, 32),
+	}
+}
+
+// Load is same as sync.Map Load
+func (m *Map) Load(key interface{}) (elem interface{}, found bool) {
+	m.lock.RLock()
+	elem, found = m.data[key]
+	m.lock.RUnlock()
+	return
+}
+
+// Load is same as sync.Map Store
+func (m *Map) Store(key interface{}, elem interface{}) {
+	m.lock.Lock()
+	m.data[key] = elem
+	m.lock.Unlock()
+}
diff --git a/vendor/github.com/modern-go/concurrent/log.go b/vendor/github.com/modern-go/concurrent/log.go
new file mode 100644
index 000000000..9756fcc75
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/log.go
@@ -0,0 +1,13 @@
+package concurrent
+
+import (
+	"os"
+	"log"
+	"io/ioutil"
+)
+
+// ErrorLogger is used to print out error, can be set to writer other than stderr
+var ErrorLogger = log.New(os.Stderr, "", 0)
+
+// InfoLogger is used to print informational message, default to off
+var InfoLogger = log.New(ioutil.Discard, "", 0)
\ No newline at end of file
diff --git a/vendor/github.com/modern-go/concurrent/unbounded_executor.go b/vendor/github.com/modern-go/concurrent/unbounded_executor.go
new file mode 100644
index 000000000..05a77dceb
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/unbounded_executor.go
@@ -0,0 +1,119 @@
+package concurrent
+
+import (
+	"context"
+	"fmt"
+	"runtime"
+	"runtime/debug"
+	"sync"
+	"time"
+	"reflect"
+)
+
+// HandlePanic logs goroutine panic by default
+var HandlePanic = func(recovered interface{}, funcName string) {
+	ErrorLogger.Println(fmt.Sprintf("%s panic: %v", funcName, recovered))
+	ErrorLogger.Println(string(debug.Stack()))
+}
+
+// UnboundedExecutor is a executor without limits on counts of alive goroutines
+// it tracks the goroutine started by it, and can cancel them when shutdown
+type UnboundedExecutor struct {
+	ctx                   context.Context
+	cancel                context.CancelFunc
+	activeGoroutinesMutex *sync.Mutex
+	activeGoroutines      map[string]int
+	HandlePanic           func(recovered interface{}, funcName string)
+}
+
+// GlobalUnboundedExecutor has the life cycle of the program itself
+// any goroutine want to be shutdown before main exit can be started from this executor
+// GlobalUnboundedExecutor expects the main function to call stop
+// it does not magically knows the main function exits
+var GlobalUnboundedExecutor = NewUnboundedExecutor()
+
+// NewUnboundedExecutor creates a new UnboundedExecutor,
+// UnboundedExecutor can not be created by &UnboundedExecutor{}
+// HandlePanic can be set with a callback to override global HandlePanic
+func NewUnboundedExecutor() *UnboundedExecutor {
+	ctx, cancel := context.WithCancel(context.TODO())
+	return &UnboundedExecutor{
+		ctx:                   ctx,
+		cancel:                cancel,
+		activeGoroutinesMutex: &sync.Mutex{},
+		activeGoroutines:      map[string]int{},
+	}
+}
+
+// Go starts a new goroutine and tracks its lifecycle.
+// Panic will be recovered and logged automatically, except for StopSignal
+func (executor *UnboundedExecutor) Go(handler func(ctx context.Context)) {
+	pc := reflect.ValueOf(handler).Pointer()
+	f := runtime.FuncForPC(pc)
+	funcName := f.Name()
+	file, line := f.FileLine(pc)
+	executor.activeGoroutinesMutex.Lock()
+	defer executor.activeGoroutinesMutex.Unlock()
+	startFrom := fmt.Sprintf("%s:%d", file, line)
+	executor.activeGoroutines[startFrom] += 1
+	go func() {
+		defer func() {
+			recovered := recover()
+			// if you want to quit a goroutine without trigger HandlePanic
+			// use runtime.Goexit() to quit
+			if recovered != nil {
+				if executor.HandlePanic == nil {
+					HandlePanic(recovered, funcName)
+				} else {
+					executor.HandlePanic(recovered, funcName)
+				}
+			}
+			executor.activeGoroutinesMutex.Lock()
+			executor.activeGoroutines[startFrom] -= 1
+			executor.activeGoroutinesMutex.Unlock()
+		}()
+		handler(executor.ctx)
+	}()
+}
+
+// Stop cancel all goroutines started by this executor without wait
+func (executor *UnboundedExecutor) Stop() {
+	executor.cancel()
+}
+
+// StopAndWaitForever cancel all goroutines started by this executor and
+// wait until all goroutines exited
+func (executor *UnboundedExecutor) StopAndWaitForever() {
+	executor.StopAndWait(context.Background())
+}
+
+// StopAndWait cancel all goroutines started by this executor and wait.
+// Wait can be cancelled by the context passed in.
+func (executor *UnboundedExecutor) StopAndWait(ctx context.Context) {
+	executor.cancel()
+	for {
+		oneHundredMilliseconds := time.NewTimer(time.Millisecond * 100)
+		select {
+		case <-oneHundredMilliseconds.C:
+			if executor.checkNoActiveGoroutines() {
+				return
+			}
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (executor *UnboundedExecutor) checkNoActiveGoroutines() bool {
+	executor.activeGoroutinesMutex.Lock()
+	defer executor.activeGoroutinesMutex.Unlock()
+	for startFrom, count := range executor.activeGoroutines {
+		if count > 0 {
+			InfoLogger.Println("UnboundedExecutor is still waiting goroutines to quit",
+				"startFrom", startFrom,
+				"count", count)
+			return false
+		}
+	}
+	return true
+}
diff --git a/vendor/github.com/modern-go/reflect2/LICENSE b/vendor/github.com/modern-go/reflect2/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
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+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/modern-go/reflect2/README.md b/vendor/github.com/modern-go/reflect2/README.md
new file mode 100644
index 000000000..6f968aab9
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/README.md
@@ -0,0 +1,71 @@
+# reflect2
+
+[![Sourcegraph](https://sourcegraph.com/github.com/modern-go/reflect2/-/badge.svg)](https://sourcegraph.com/github.com/modern-go/reflect2?badge)
+[![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/modern-go/reflect2)
+[![Build Status](https://travis-ci.org/modern-go/reflect2.svg?branch=master)](https://travis-ci.org/modern-go/reflect2)
+[![codecov](https://codecov.io/gh/modern-go/reflect2/branch/master/graph/badge.svg)](https://codecov.io/gh/modern-go/reflect2)
+[![rcard](https://goreportcard.com/badge/github.com/modern-go/reflect2)](https://goreportcard.com/report/github.com/modern-go/reflect2)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://raw.githubusercontent.com/modern-go/reflect2/master/LICENSE)
+
+reflect api that avoids runtime reflect.Value cost
+
+* reflect get/set interface{}, with type checking
+* reflect get/set unsafe.Pointer, without type checking
+* `reflect2.TypeByName` works like `Class.forName` found in java
+
+[json-iterator](https://github.com/json-iterator/go) use this package to save runtime dispatching cost.
+This package is designed for low level libraries to optimize reflection performance.
+General application should still use reflect standard library.
+
+# reflect2.TypeByName
+
+```go
+// given package is github.com/your/awesome-package
+type MyStruct struct {
+	// ...
+}
+
+// will return the type
+reflect2.TypeByName("awesome-package.MyStruct")
+// however, if the type has not been used
+// it will be eliminated by compiler, so we can not get it in runtime
+```
+
+# reflect2 get/set interface{}
+
+```go
+valType := reflect2.TypeOf(1)
+i := 1
+j := 10
+valType.Set(&i, &j)
+// i will be 10
+```
+
+to get set `type`, always use its pointer `*type`
+
+# reflect2 get/set unsafe.Pointer
+
+```go
+valType := reflect2.TypeOf(1)
+i := 1
+j := 10
+valType.UnsafeSet(unsafe.Pointer(&i), unsafe.Pointer(&j))
+// i will be 10
+```
+
+to get set `type`, always use its pointer `*type`
+
+# benchmark
+
+Benchmark is not necessary for this package. It does nothing actually.
+As it is just a thin wrapper to make go runtime public. 
+Both `reflect2` and `reflect` call same function 
+provided by `runtime` package exposed by go language.
+
+# unsafe safety
+
+Instead of casting `[]byte` to `sliceHeader` in your application using unsafe.
+We can use reflect2 instead. This way, if `sliceHeader` changes in the future,
+only reflect2 need to be upgraded.
+
+reflect2 tries its best to keep the implementation same as reflect (by testing).
\ No newline at end of file
diff --git a/vendor/github.com/modern-go/reflect2/go_above_17.go b/vendor/github.com/modern-go/reflect2/go_above_17.go
new file mode 100644
index 000000000..5c1cea868
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/go_above_17.go
@@ -0,0 +1,8 @@
+//+build go1.7
+
+package reflect2
+
+import "unsafe"
+
+//go:linkname resolveTypeOff reflect.resolveTypeOff
+func resolveTypeOff(rtype unsafe.Pointer, off int32) unsafe.Pointer
diff --git a/vendor/github.com/modern-go/reflect2/go_above_19.go b/vendor/github.com/modern-go/reflect2/go_above_19.go
new file mode 100644
index 000000000..c7e3b7801
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/go_above_19.go
@@ -0,0 +1,14 @@
+//+build go1.9
+
+package reflect2
+
+import (
+	"unsafe"
+)
+
+//go:linkname makemap reflect.makemap
+func makemap(rtype unsafe.Pointer, cap int) (m unsafe.Pointer)
+
+func makeMapWithSize(rtype unsafe.Pointer, cap int) unsafe.Pointer {
+	return makemap(rtype, cap)
+}
diff --git a/vendor/github.com/modern-go/reflect2/go_below_17.go b/vendor/github.com/modern-go/reflect2/go_below_17.go
new file mode 100644
index 000000000..65a93c889
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/go_below_17.go
@@ -0,0 +1,9 @@
+//+build !go1.7
+
+package reflect2
+
+import "unsafe"
+
+func resolveTypeOff(rtype unsafe.Pointer, off int32) unsafe.Pointer {
+	return nil
+}
diff --git a/vendor/github.com/modern-go/reflect2/go_below_19.go b/vendor/github.com/modern-go/reflect2/go_below_19.go
new file mode 100644
index 000000000..b050ef70c
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/go_below_19.go
@@ -0,0 +1,14 @@
+//+build !go1.9
+
+package reflect2
+
+import (
+	"unsafe"
+)
+
+//go:linkname makemap reflect.makemap
+func makemap(rtype unsafe.Pointer) (m unsafe.Pointer)
+
+func makeMapWithSize(rtype unsafe.Pointer, cap int) unsafe.Pointer {
+	return makemap(rtype)
+}
diff --git a/vendor/github.com/modern-go/reflect2/reflect2.go b/vendor/github.com/modern-go/reflect2/reflect2.go
new file mode 100644
index 000000000..63b49c799
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/reflect2.go
@@ -0,0 +1,298 @@
+package reflect2
+
+import (
+	"github.com/modern-go/concurrent"
+	"reflect"
+	"unsafe"
+)
+
+type Type interface {
+	Kind() reflect.Kind
+	// New return pointer to data of this type
+	New() interface{}
+	// UnsafeNew return the allocated space pointed by unsafe.Pointer
+	UnsafeNew() unsafe.Pointer
+	// PackEFace cast a unsafe pointer to object represented pointer
+	PackEFace(ptr unsafe.Pointer) interface{}
+	// Indirect dereference object represented pointer to this type
+	Indirect(obj interface{}) interface{}
+	// UnsafeIndirect dereference pointer to this type
+	UnsafeIndirect(ptr unsafe.Pointer) interface{}
+	// Type1 returns reflect.Type
+	Type1() reflect.Type
+	Implements(thatType Type) bool
+	String() string
+	RType() uintptr
+	// interface{} of this type has pointer like behavior
+	LikePtr() bool
+	IsNullable() bool
+	IsNil(obj interface{}) bool
+	UnsafeIsNil(ptr unsafe.Pointer) bool
+	Set(obj interface{}, val interface{})
+	UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer)
+	AssignableTo(anotherType Type) bool
+}
+
+type ListType interface {
+	Type
+	Elem() Type
+	SetIndex(obj interface{}, index int, elem interface{})
+	UnsafeSetIndex(obj unsafe.Pointer, index int, elem unsafe.Pointer)
+	GetIndex(obj interface{}, index int) interface{}
+	UnsafeGetIndex(obj unsafe.Pointer, index int) unsafe.Pointer
+}
+
+type ArrayType interface {
+	ListType
+	Len() int
+}
+
+type SliceType interface {
+	ListType
+	MakeSlice(length int, cap int) interface{}
+	UnsafeMakeSlice(length int, cap int) unsafe.Pointer
+	Grow(obj interface{}, newLength int)
+	UnsafeGrow(ptr unsafe.Pointer, newLength int)
+	Append(obj interface{}, elem interface{})
+	UnsafeAppend(obj unsafe.Pointer, elem unsafe.Pointer)
+	LengthOf(obj interface{}) int
+	UnsafeLengthOf(ptr unsafe.Pointer) int
+	SetNil(obj interface{})
+	UnsafeSetNil(ptr unsafe.Pointer)
+	Cap(obj interface{}) int
+	UnsafeCap(ptr unsafe.Pointer) int
+}
+
+type StructType interface {
+	Type
+	NumField() int
+	Field(i int) StructField
+	FieldByName(name string) StructField
+	FieldByIndex(index []int) StructField
+	FieldByNameFunc(match func(string) bool) StructField
+}
+
+type StructField interface {
+	Offset() uintptr
+	Name() string
+	PkgPath() string
+	Type() Type
+	Tag() reflect.StructTag
+	Index() []int
+	Anonymous() bool
+	Set(obj interface{}, value interface{})
+	UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer)
+	Get(obj interface{}) interface{}
+	UnsafeGet(obj unsafe.Pointer) unsafe.Pointer
+}
+
+type MapType interface {
+	Type
+	Key() Type
+	Elem() Type
+	MakeMap(cap int) interface{}
+	UnsafeMakeMap(cap int) unsafe.Pointer
+	SetIndex(obj interface{}, key interface{}, elem interface{})
+	UnsafeSetIndex(obj unsafe.Pointer, key unsafe.Pointer, elem unsafe.Pointer)
+	TryGetIndex(obj interface{}, key interface{}) (interface{}, bool)
+	GetIndex(obj interface{}, key interface{}) interface{}
+	UnsafeGetIndex(obj unsafe.Pointer, key unsafe.Pointer) unsafe.Pointer
+	Iterate(obj interface{}) MapIterator
+	UnsafeIterate(obj unsafe.Pointer) MapIterator
+}
+
+type MapIterator interface {
+	HasNext() bool
+	Next() (key interface{}, elem interface{})
+	UnsafeNext() (key unsafe.Pointer, elem unsafe.Pointer)
+}
+
+type PtrType interface {
+	Type
+	Elem() Type
+}
+
+type InterfaceType interface {
+	NumMethod() int
+}
+
+type Config struct {
+	UseSafeImplementation bool
+}
+
+type API interface {
+	TypeOf(obj interface{}) Type
+	Type2(type1 reflect.Type) Type
+}
+
+var ConfigUnsafe = Config{UseSafeImplementation: false}.Froze()
+var ConfigSafe = Config{UseSafeImplementation: true}.Froze()
+
+type frozenConfig struct {
+	useSafeImplementation bool
+	cache                 *concurrent.Map
+}
+
+func (cfg Config) Froze() *frozenConfig {
+	return &frozenConfig{
+		useSafeImplementation: cfg.UseSafeImplementation,
+		cache: concurrent.NewMap(),
+	}
+}
+
+func (cfg *frozenConfig) TypeOf(obj interface{}) Type {
+	cacheKey := uintptr(unpackEFace(obj).rtype)
+	typeObj, found := cfg.cache.Load(cacheKey)
+	if found {
+		return typeObj.(Type)
+	}
+	return cfg.Type2(reflect.TypeOf(obj))
+}
+
+func (cfg *frozenConfig) Type2(type1 reflect.Type) Type {
+	if type1 == nil {
+		return nil
+	}
+	cacheKey := uintptr(unpackEFace(type1).data)
+	typeObj, found := cfg.cache.Load(cacheKey)
+	if found {
+		return typeObj.(Type)
+	}
+	type2 := cfg.wrapType(type1)
+	cfg.cache.Store(cacheKey, type2)
+	return type2
+}
+
+func (cfg *frozenConfig) wrapType(type1 reflect.Type) Type {
+	safeType := safeType{Type: type1, cfg: cfg}
+	switch type1.Kind() {
+	case reflect.Struct:
+		if cfg.useSafeImplementation {
+			return &safeStructType{safeType}
+		}
+		return newUnsafeStructType(cfg, type1)
+	case reflect.Array:
+		if cfg.useSafeImplementation {
+			return &safeSliceType{safeType}
+		}
+		return newUnsafeArrayType(cfg, type1)
+	case reflect.Slice:
+		if cfg.useSafeImplementation {
+			return &safeSliceType{safeType}
+		}
+		return newUnsafeSliceType(cfg, type1)
+	case reflect.Map:
+		if cfg.useSafeImplementation {
+			return &safeMapType{safeType}
+		}
+		return newUnsafeMapType(cfg, type1)
+	case reflect.Ptr, reflect.Chan, reflect.Func:
+		if cfg.useSafeImplementation {
+			return &safeMapType{safeType}
+		}
+		return newUnsafePtrType(cfg, type1)
+	case reflect.Interface:
+		if cfg.useSafeImplementation {
+			return &safeMapType{safeType}
+		}
+		if type1.NumMethod() == 0 {
+			return newUnsafeEFaceType(cfg, type1)
+		}
+		return newUnsafeIFaceType(cfg, type1)
+	default:
+		if cfg.useSafeImplementation {
+			return &safeType
+		}
+		return newUnsafeType(cfg, type1)
+	}
+}
+
+func TypeOf(obj interface{}) Type {
+	return ConfigUnsafe.TypeOf(obj)
+}
+
+func TypeOfPtr(obj interface{}) PtrType {
+	return TypeOf(obj).(PtrType)
+}
+
+func Type2(type1 reflect.Type) Type {
+	if type1 == nil {
+		return nil
+	}
+	return ConfigUnsafe.Type2(type1)
+}
+
+func PtrTo(typ Type) Type {
+	return Type2(reflect.PtrTo(typ.Type1()))
+}
+
+func PtrOf(obj interface{}) unsafe.Pointer {
+	return unpackEFace(obj).data
+}
+
+func RTypeOf(obj interface{}) uintptr {
+	return uintptr(unpackEFace(obj).rtype)
+}
+
+func IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	return unpackEFace(obj).data == nil
+}
+
+func IsNullable(kind reflect.Kind) bool {
+	switch kind {
+	case reflect.Ptr, reflect.Map, reflect.Chan, reflect.Func, reflect.Slice, reflect.Interface:
+		return true
+	}
+	return false
+}
+
+func likePtrKind(kind reflect.Kind) bool {
+	switch kind {
+	case reflect.Ptr, reflect.Map, reflect.Chan, reflect.Func:
+		return true
+	}
+	return false
+}
+
+func likePtrType(typ reflect.Type) bool {
+	if likePtrKind(typ.Kind()) {
+		return true
+	}
+	if typ.Kind() == reflect.Struct {
+		if typ.NumField() != 1 {
+			return false
+		}
+		return likePtrType(typ.Field(0).Type)
+	}
+	if typ.Kind() == reflect.Array {
+		if typ.Len() != 1 {
+			return false
+		}
+		return likePtrType(typ.Elem())
+	}
+	return false
+}
+
+// NoEscape hides a pointer from escape analysis.  noescape is
+// the identity function but escape analysis doesn't think the
+// output depends on the input.  noescape is inlined and currently
+// compiles down to zero instructions.
+// USE CAREFULLY!
+//go:nosplit
+func NoEscape(p unsafe.Pointer) unsafe.Pointer {
+	x := uintptr(p)
+	return unsafe.Pointer(x ^ 0)
+}
+
+func UnsafeCastString(str string) []byte {
+	stringHeader := (*reflect.StringHeader)(unsafe.Pointer(&str))
+	sliceHeader := &reflect.SliceHeader{
+		Data: stringHeader.Data,
+		Cap: stringHeader.Len,
+		Len: stringHeader.Len,
+	}
+	return *(*[]byte)(unsafe.Pointer(sliceHeader))
+}
diff --git a/vendor/github.com/modern-go/reflect2/reflect2_amd64.s b/vendor/github.com/modern-go/reflect2/reflect2_amd64.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/reflect2_amd64.s
diff --git a/vendor/github.com/modern-go/reflect2/reflect2_kind.go b/vendor/github.com/modern-go/reflect2/reflect2_kind.go
new file mode 100644
index 000000000..62f299e40
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/reflect2_kind.go
@@ -0,0 +1,30 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// DefaultTypeOfKind return the non aliased default type for the kind
+func DefaultTypeOfKind(kind reflect.Kind) Type {
+	return kindTypes[kind]
+}
+
+var kindTypes = map[reflect.Kind]Type{
+	reflect.Bool:          TypeOf(true),
+	reflect.Uint8:         TypeOf(uint8(0)),
+	reflect.Int8:          TypeOf(int8(0)),
+	reflect.Uint16:        TypeOf(uint16(0)),
+	reflect.Int16:         TypeOf(int16(0)),
+	reflect.Uint32:        TypeOf(uint32(0)),
+	reflect.Int32:         TypeOf(int32(0)),
+	reflect.Uint64:        TypeOf(uint64(0)),
+	reflect.Int64:         TypeOf(int64(0)),
+	reflect.Uint:          TypeOf(uint(0)),
+	reflect.Int:           TypeOf(int(0)),
+	reflect.Float32:       TypeOf(float32(0)),
+	reflect.Float64:       TypeOf(float64(0)),
+	reflect.Uintptr:       TypeOf(uintptr(0)),
+	reflect.String:        TypeOf(""),
+	reflect.UnsafePointer: TypeOf(unsafe.Pointer(nil)),
+}
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_386.s b/vendor/github.com/modern-go/reflect2/relfect2_386.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_386.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_amd64p32.s b/vendor/github.com/modern-go/reflect2/relfect2_amd64p32.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_amd64p32.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_arm.s b/vendor/github.com/modern-go/reflect2/relfect2_arm.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_arm.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_arm64.s b/vendor/github.com/modern-go/reflect2/relfect2_arm64.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_arm64.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_mips64x.s b/vendor/github.com/modern-go/reflect2/relfect2_mips64x.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_mips64x.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_mipsx.s b/vendor/github.com/modern-go/reflect2/relfect2_mipsx.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_mipsx.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_ppc64x.s b/vendor/github.com/modern-go/reflect2/relfect2_ppc64x.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_ppc64x.s
diff --git a/vendor/github.com/modern-go/reflect2/relfect2_s390x.s b/vendor/github.com/modern-go/reflect2/relfect2_s390x.s
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/relfect2_s390x.s
diff --git a/vendor/github.com/modern-go/reflect2/safe_field.go b/vendor/github.com/modern-go/reflect2/safe_field.go
new file mode 100644
index 000000000..d4ba1f4f8
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/safe_field.go
@@ -0,0 +1,58 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type safeField struct {
+	reflect.StructField
+}
+
+func (field *safeField) Offset() uintptr {
+	return field.StructField.Offset
+}
+
+func (field *safeField) Name() string {
+	return field.StructField.Name
+}
+
+func (field *safeField) PkgPath() string {
+	return field.StructField.PkgPath
+}
+
+func (field *safeField) Type() Type {
+	panic("not implemented")
+}
+
+func (field *safeField) Tag() reflect.StructTag {
+	return field.StructField.Tag
+}
+
+func (field *safeField) Index() []int {
+	return field.StructField.Index
+}
+
+func (field *safeField) Anonymous() bool {
+	return field.StructField.Anonymous
+}
+
+func (field *safeField) Set(obj interface{}, value interface{}) {
+	val := reflect.ValueOf(obj).Elem()
+	val.FieldByIndex(field.Index()).Set(reflect.ValueOf(value).Elem())
+}
+
+func (field *safeField) UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer) {
+	panic("unsafe operation is not supported")
+}
+
+func (field *safeField) Get(obj interface{}) interface{} {
+	val := reflect.ValueOf(obj).Elem().FieldByIndex(field.Index())
+	ptr := reflect.New(val.Type())
+	ptr.Elem().Set(val)
+	return ptr.Interface()
+}
+
+func (field *safeField) UnsafeGet(obj unsafe.Pointer) unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
diff --git a/vendor/github.com/modern-go/reflect2/safe_map.go b/vendor/github.com/modern-go/reflect2/safe_map.go
new file mode 100644
index 000000000..88362205a
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/safe_map.go
@@ -0,0 +1,101 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type safeMapType struct {
+	safeType
+}
+
+func (type2 *safeMapType) Key() Type {
+	return type2.safeType.cfg.Type2(type2.Type.Key())
+}
+
+func (type2 *safeMapType) MakeMap(cap int) interface{} {
+	ptr := reflect.New(type2.Type)
+	ptr.Elem().Set(reflect.MakeMap(type2.Type))
+	return ptr.Interface()
+}
+
+func (type2 *safeMapType) UnsafeMakeMap(cap int) unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeMapType) SetIndex(obj interface{}, key interface{}, elem interface{}) {
+	keyVal := reflect.ValueOf(key)
+	elemVal := reflect.ValueOf(elem)
+	val := reflect.ValueOf(obj)
+	val.Elem().SetMapIndex(keyVal.Elem(), elemVal.Elem())
+}
+
+func (type2 *safeMapType) UnsafeSetIndex(obj unsafe.Pointer, key unsafe.Pointer, elem unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeMapType) TryGetIndex(obj interface{}, key interface{}) (interface{}, bool) {
+	keyVal := reflect.ValueOf(key)
+	if key == nil {
+		keyVal = reflect.New(type2.Type.Key()).Elem()
+	}
+	val := reflect.ValueOf(obj).MapIndex(keyVal)
+	if !val.IsValid() {
+		return nil, false
+	}
+	return val.Interface(), true
+}
+
+func (type2 *safeMapType) GetIndex(obj interface{}, key interface{}) interface{} {
+	val := reflect.ValueOf(obj).Elem()
+	keyVal := reflect.ValueOf(key).Elem()
+	elemVal := val.MapIndex(keyVal)
+	if !elemVal.IsValid() {
+		ptr := reflect.New(reflect.PtrTo(val.Type().Elem()))
+		return ptr.Elem().Interface()
+	}
+	ptr := reflect.New(elemVal.Type())
+	ptr.Elem().Set(elemVal)
+	return ptr.Interface()
+}
+
+func (type2 *safeMapType) UnsafeGetIndex(obj unsafe.Pointer, key unsafe.Pointer) unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeMapType) Iterate(obj interface{}) MapIterator {
+	m := reflect.ValueOf(obj).Elem()
+	return &safeMapIterator{
+		m:    m,
+		keys: m.MapKeys(),
+	}
+}
+
+func (type2 *safeMapType) UnsafeIterate(obj unsafe.Pointer) MapIterator {
+	panic("does not support unsafe operation")
+}
+
+type safeMapIterator struct {
+	i    int
+	m    reflect.Value
+	keys []reflect.Value
+}
+
+func (iter *safeMapIterator) HasNext() bool {
+	return iter.i != len(iter.keys)
+}
+
+func (iter *safeMapIterator) Next() (interface{}, interface{}) {
+	key := iter.keys[iter.i]
+	elem := iter.m.MapIndex(key)
+	iter.i += 1
+	keyPtr := reflect.New(key.Type())
+	keyPtr.Elem().Set(key)
+	elemPtr := reflect.New(elem.Type())
+	elemPtr.Elem().Set(elem)
+	return keyPtr.Interface(), elemPtr.Interface()
+}
+
+func (iter *safeMapIterator) UnsafeNext() (unsafe.Pointer, unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
diff --git a/vendor/github.com/modern-go/reflect2/safe_slice.go b/vendor/github.com/modern-go/reflect2/safe_slice.go
new file mode 100644
index 000000000..bcce6fd20
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/safe_slice.go
@@ -0,0 +1,92 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type safeSliceType struct {
+	safeType
+}
+
+func (type2 *safeSliceType) SetIndex(obj interface{}, index int, value interface{}) {
+	val := reflect.ValueOf(obj).Elem()
+	elem := reflect.ValueOf(value).Elem()
+	val.Index(index).Set(elem)
+}
+
+func (type2 *safeSliceType) UnsafeSetIndex(obj unsafe.Pointer, index int, value unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) GetIndex(obj interface{}, index int) interface{} {
+	val := reflect.ValueOf(obj).Elem()
+	elem := val.Index(index)
+	ptr := reflect.New(elem.Type())
+	ptr.Elem().Set(elem)
+	return ptr.Interface()
+}
+
+func (type2 *safeSliceType) UnsafeGetIndex(obj unsafe.Pointer, index int) unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) MakeSlice(length int, cap int) interface{} {
+	val := reflect.MakeSlice(type2.Type, length, cap)
+	ptr := reflect.New(val.Type())
+	ptr.Elem().Set(val)
+	return ptr.Interface()
+}
+
+func (type2 *safeSliceType) UnsafeMakeSlice(length int, cap int) unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) Grow(obj interface{}, newLength int) {
+	oldCap := type2.Cap(obj)
+	oldSlice := reflect.ValueOf(obj).Elem()
+	delta := newLength - oldCap
+	deltaVals := make([]reflect.Value, delta)
+	newSlice := reflect.Append(oldSlice, deltaVals...)
+	oldSlice.Set(newSlice)
+}
+
+func (type2 *safeSliceType) UnsafeGrow(ptr unsafe.Pointer, newLength int) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) Append(obj interface{}, elem interface{}) {
+	val := reflect.ValueOf(obj).Elem()
+	elemVal := reflect.ValueOf(elem).Elem()
+	newVal := reflect.Append(val, elemVal)
+	val.Set(newVal)
+}
+
+func (type2 *safeSliceType) UnsafeAppend(obj unsafe.Pointer, elem unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) SetNil(obj interface{}) {
+	val := reflect.ValueOf(obj).Elem()
+	val.Set(reflect.Zero(val.Type()))
+}
+
+func (type2 *safeSliceType) UnsafeSetNil(ptr unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) LengthOf(obj interface{}) int {
+	return reflect.ValueOf(obj).Elem().Len()
+}
+
+func (type2 *safeSliceType) UnsafeLengthOf(ptr unsafe.Pointer) int {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeSliceType) Cap(obj interface{}) int {
+	return reflect.ValueOf(obj).Elem().Cap()
+}
+
+func (type2 *safeSliceType) UnsafeCap(ptr unsafe.Pointer) int {
+	panic("does not support unsafe operation")
+}
diff --git a/vendor/github.com/modern-go/reflect2/safe_struct.go b/vendor/github.com/modern-go/reflect2/safe_struct.go
new file mode 100644
index 000000000..e5fb9b313
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/safe_struct.go
@@ -0,0 +1,29 @@
+package reflect2
+
+type safeStructType struct {
+	safeType
+}
+
+func (type2 *safeStructType) FieldByName(name string) StructField {
+	field, found := type2.Type.FieldByName(name)
+	if !found {
+		panic("field " + name + " not found")
+	}
+	return &safeField{StructField: field}
+}
+
+func (type2 *safeStructType) Field(i int) StructField {
+	return &safeField{StructField: type2.Type.Field(i)}
+}
+
+func (type2 *safeStructType) FieldByIndex(index []int) StructField {
+	return &safeField{StructField: type2.Type.FieldByIndex(index)}
+}
+
+func (type2 *safeStructType) FieldByNameFunc(match func(string) bool) StructField {
+	field, found := type2.Type.FieldByNameFunc(match)
+	if !found {
+		panic("field match condition not found in " + type2.Type.String())
+	}
+	return &safeField{StructField: field}
+}
diff --git a/vendor/github.com/modern-go/reflect2/safe_type.go b/vendor/github.com/modern-go/reflect2/safe_type.go
new file mode 100644
index 000000000..ee4e7bb6e
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/safe_type.go
@@ -0,0 +1,78 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type safeType struct {
+	reflect.Type
+	cfg *frozenConfig
+}
+
+func (type2 *safeType) New() interface{} {
+	return reflect.New(type2.Type).Interface()
+}
+
+func (type2 *safeType) UnsafeNew() unsafe.Pointer {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) Elem() Type {
+	return type2.cfg.Type2(type2.Type.Elem())
+}
+
+func (type2 *safeType) Type1() reflect.Type {
+	return type2.Type
+}
+
+func (type2 *safeType) PackEFace(ptr unsafe.Pointer) interface{} {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) Implements(thatType Type) bool {
+	return type2.Type.Implements(thatType.Type1())
+}
+
+func (type2 *safeType) RType() uintptr {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) Indirect(obj interface{}) interface{} {
+	return reflect.Indirect(reflect.ValueOf(obj)).Interface()
+}
+
+func (type2 *safeType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) LikePtr() bool {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) IsNullable() bool {
+	return IsNullable(type2.Kind())
+}
+
+func (type2 *safeType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	return reflect.ValueOf(obj).Elem().IsNil()
+}
+
+func (type2 *safeType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) Set(obj interface{}, val interface{}) {
+	reflect.ValueOf(obj).Elem().Set(reflect.ValueOf(val).Elem())
+}
+
+func (type2 *safeType) UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer) {
+	panic("does not support unsafe operation")
+}
+
+func (type2 *safeType) AssignableTo(anotherType Type) bool {
+	return type2.Type1().AssignableTo(anotherType.Type1())
+}
diff --git a/vendor/github.com/modern-go/reflect2/type_map.go b/vendor/github.com/modern-go/reflect2/type_map.go
new file mode 100644
index 000000000..6d489112f
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/type_map.go
@@ -0,0 +1,103 @@
+package reflect2
+
+import (
+	"reflect"
+	"runtime"
+	"strings"
+	"unsafe"
+)
+
+// typelinks1 for 1.5 ~ 1.6
+//go:linkname typelinks1 reflect.typelinks
+func typelinks1() [][]unsafe.Pointer
+
+// typelinks2 for 1.7 ~
+//go:linkname typelinks2 reflect.typelinks
+func typelinks2() (sections []unsafe.Pointer, offset [][]int32)
+
+var types = map[string]reflect.Type{}
+var packages = map[string]map[string]reflect.Type{}
+
+func init() {
+	ver := runtime.Version()
+	if ver == "go1.5" || strings.HasPrefix(ver, "go1.5.") {
+		loadGo15Types()
+	} else if ver == "go1.6" || strings.HasPrefix(ver, "go1.6.") {
+		loadGo15Types()
+	} else {
+		loadGo17Types()
+	}
+}
+
+func loadGo15Types() {
+	var obj interface{} = reflect.TypeOf(0)
+	typePtrss := typelinks1()
+	for _, typePtrs := range typePtrss {
+		for _, typePtr := range typePtrs {
+			(*emptyInterface)(unsafe.Pointer(&obj)).word = typePtr
+			typ := obj.(reflect.Type)
+			if typ.Kind() == reflect.Ptr && typ.Elem().Kind() == reflect.Struct {
+				loadedType := typ.Elem()
+				pkgTypes := packages[loadedType.PkgPath()]
+				if pkgTypes == nil {
+					pkgTypes = map[string]reflect.Type{}
+					packages[loadedType.PkgPath()] = pkgTypes
+				}
+				types[loadedType.String()] = loadedType
+				pkgTypes[loadedType.Name()] = loadedType
+			}
+			if typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Ptr &&
+				typ.Elem().Elem().Kind() == reflect.Struct {
+				loadedType := typ.Elem().Elem()
+				pkgTypes := packages[loadedType.PkgPath()]
+				if pkgTypes == nil {
+					pkgTypes = map[string]reflect.Type{}
+					packages[loadedType.PkgPath()] = pkgTypes
+				}
+				types[loadedType.String()] = loadedType
+				pkgTypes[loadedType.Name()] = loadedType
+			}
+		}
+	}
+}
+
+func loadGo17Types() {
+	var obj interface{} = reflect.TypeOf(0)
+	sections, offset := typelinks2()
+	for i, offs := range offset {
+		rodata := sections[i]
+		for _, off := range offs {
+			(*emptyInterface)(unsafe.Pointer(&obj)).word = resolveTypeOff(unsafe.Pointer(rodata), off)
+			typ := obj.(reflect.Type)
+			if typ.Kind() == reflect.Ptr && typ.Elem().Kind() == reflect.Struct {
+				loadedType := typ.Elem()
+				pkgTypes := packages[loadedType.PkgPath()]
+				if pkgTypes == nil {
+					pkgTypes = map[string]reflect.Type{}
+					packages[loadedType.PkgPath()] = pkgTypes
+				}
+				types[loadedType.String()] = loadedType
+				pkgTypes[loadedType.Name()] = loadedType
+			}
+		}
+	}
+}
+
+type emptyInterface struct {
+	typ  unsafe.Pointer
+	word unsafe.Pointer
+}
+
+// TypeByName return the type by its name, just like Class.forName in java
+func TypeByName(typeName string) Type {
+	return Type2(types[typeName])
+}
+
+// TypeByPackageName return the type by its package and name
+func TypeByPackageName(pkgPath string, name string) Type {
+	pkgTypes := packages[pkgPath]
+	if pkgTypes == nil {
+		return nil
+	}
+	return Type2(pkgTypes[name])
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_array.go b/vendor/github.com/modern-go/reflect2/unsafe_array.go
new file mode 100644
index 000000000..76cbdba6e
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_array.go
@@ -0,0 +1,65 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeArrayType struct {
+	unsafeType
+	elemRType  unsafe.Pointer
+	pElemRType unsafe.Pointer
+	elemSize   uintptr
+	likePtr    bool
+}
+
+func newUnsafeArrayType(cfg *frozenConfig, type1 reflect.Type) *UnsafeArrayType {
+	return &UnsafeArrayType{
+		unsafeType: *newUnsafeType(cfg, type1),
+		elemRType:  unpackEFace(type1.Elem()).data,
+		pElemRType: unpackEFace(reflect.PtrTo(type1.Elem())).data,
+		elemSize:   type1.Elem().Size(),
+		likePtr:    likePtrType(type1),
+	}
+}
+
+func (type2 *UnsafeArrayType) LikePtr() bool {
+	return type2.likePtr
+}
+
+func (type2 *UnsafeArrayType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeArrayType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	if type2.likePtr {
+		return packEFace(type2.rtype, *(*unsafe.Pointer)(ptr))
+	}
+	return packEFace(type2.rtype, ptr)
+}
+
+func (type2 *UnsafeArrayType) SetIndex(obj interface{}, index int, elem interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("ArrayType.SetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	elemEFace := unpackEFace(elem)
+	assertType("ArrayType.SetIndex argument 3", type2.pElemRType, elemEFace.rtype)
+	type2.UnsafeSetIndex(objEFace.data, index, elemEFace.data)
+}
+
+func (type2 *UnsafeArrayType) UnsafeSetIndex(obj unsafe.Pointer, index int, elem unsafe.Pointer) {
+	elemPtr := arrayAt(obj, index, type2.elemSize, "i < s.Len")
+	typedmemmove(type2.elemRType, elemPtr, elem)
+}
+
+func (type2 *UnsafeArrayType) GetIndex(obj interface{}, index int) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("ArrayType.GetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	elemPtr := type2.UnsafeGetIndex(objEFace.data, index)
+	return packEFace(type2.pElemRType, elemPtr)
+}
+
+func (type2 *UnsafeArrayType) UnsafeGetIndex(obj unsafe.Pointer, index int) unsafe.Pointer {
+	return arrayAt(obj, index, type2.elemSize, "i < s.Len")
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_eface.go b/vendor/github.com/modern-go/reflect2/unsafe_eface.go
new file mode 100644
index 000000000..805010f3a
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_eface.go
@@ -0,0 +1,59 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type eface struct {
+	rtype unsafe.Pointer
+	data  unsafe.Pointer
+}
+
+func unpackEFace(obj interface{}) *eface {
+	return (*eface)(unsafe.Pointer(&obj))
+}
+
+func packEFace(rtype unsafe.Pointer, data unsafe.Pointer) interface{} {
+	var i interface{}
+	e := (*eface)(unsafe.Pointer(&i))
+	e.rtype = rtype
+	e.data = data
+	return i
+}
+
+type UnsafeEFaceType struct {
+	unsafeType
+}
+
+func newUnsafeEFaceType(cfg *frozenConfig, type1 reflect.Type) *UnsafeEFaceType {
+	return &UnsafeEFaceType{
+		unsafeType: *newUnsafeType(cfg, type1),
+	}
+}
+
+func (type2 *UnsafeEFaceType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafeEFaceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	return unpackEFace(*(*interface{})(ptr)).data == nil
+}
+
+func (type2 *UnsafeEFaceType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeEFaceType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	return *(*interface{})(ptr)
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_field.go b/vendor/github.com/modern-go/reflect2/unsafe_field.go
new file mode 100644
index 000000000..5eb53130a
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_field.go
@@ -0,0 +1,74 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeStructField struct {
+	reflect.StructField
+	structType *UnsafeStructType
+	rtype      unsafe.Pointer
+	ptrRType   unsafe.Pointer
+}
+
+func newUnsafeStructField(structType *UnsafeStructType, structField reflect.StructField) *UnsafeStructField {
+	return &UnsafeStructField{
+		StructField: structField,
+		rtype:       unpackEFace(structField.Type).data,
+		ptrRType:    unpackEFace(reflect.PtrTo(structField.Type)).data,
+		structType:  structType,
+	}
+}
+
+func (field *UnsafeStructField) Offset() uintptr {
+	return field.StructField.Offset
+}
+
+func (field *UnsafeStructField) Name() string {
+	return field.StructField.Name
+}
+
+func (field *UnsafeStructField) PkgPath() string {
+	return field.StructField.PkgPath
+}
+
+func (field *UnsafeStructField) Type() Type {
+	return field.structType.cfg.Type2(field.StructField.Type)
+}
+
+func (field *UnsafeStructField) Tag() reflect.StructTag {
+	return field.StructField.Tag
+}
+
+func (field *UnsafeStructField) Index() []int {
+	return field.StructField.Index
+}
+
+func (field *UnsafeStructField) Anonymous() bool {
+	return field.StructField.Anonymous
+}
+
+func (field *UnsafeStructField) Set(obj interface{}, value interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("StructField.SetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
+	valueEFace := unpackEFace(value)
+	assertType("StructField.SetIndex argument 2", field.ptrRType, valueEFace.rtype)
+	field.UnsafeSet(objEFace.data, valueEFace.data)
+}
+
+func (field *UnsafeStructField) UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer) {
+	fieldPtr := add(obj, field.StructField.Offset, "same as non-reflect &v.field")
+	typedmemmove(field.rtype, fieldPtr, value)
+}
+
+func (field *UnsafeStructField) Get(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("StructField.GetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
+	value := field.UnsafeGet(objEFace.data)
+	return packEFace(field.ptrRType, value)
+}
+
+func (field *UnsafeStructField) UnsafeGet(obj unsafe.Pointer) unsafe.Pointer {
+	return add(obj, field.StructField.Offset, "same as non-reflect &v.field")
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_iface.go b/vendor/github.com/modern-go/reflect2/unsafe_iface.go
new file mode 100644
index 000000000..b60195533
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_iface.go
@@ -0,0 +1,64 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type iface struct {
+	itab *itab
+	data unsafe.Pointer
+}
+
+type itab struct {
+	ignore unsafe.Pointer
+	rtype  unsafe.Pointer
+}
+
+func IFaceToEFace(ptr unsafe.Pointer) interface{} {
+	iface := (*iface)(ptr)
+	if iface.itab == nil {
+		return nil
+	}
+	return packEFace(iface.itab.rtype, iface.data)
+}
+
+type UnsafeIFaceType struct {
+	unsafeType
+}
+
+func newUnsafeIFaceType(cfg *frozenConfig, type1 reflect.Type) *UnsafeIFaceType {
+	return &UnsafeIFaceType{
+		unsafeType: *newUnsafeType(cfg, type1),
+	}
+}
+
+func (type2 *UnsafeIFaceType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeIFaceType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	return IFaceToEFace(ptr)
+}
+
+func (type2 *UnsafeIFaceType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafeIFaceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	iface := (*iface)(ptr)
+	if iface.itab == nil {
+		return true
+	}
+	return false
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_link.go b/vendor/github.com/modern-go/reflect2/unsafe_link.go
new file mode 100644
index 000000000..57229c8db
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_link.go
@@ -0,0 +1,70 @@
+package reflect2
+
+import "unsafe"
+
+//go:linkname unsafe_New reflect.unsafe_New
+func unsafe_New(rtype unsafe.Pointer) unsafe.Pointer
+
+//go:linkname typedmemmove reflect.typedmemmove
+func typedmemmove(rtype unsafe.Pointer, dst, src unsafe.Pointer)
+
+//go:linkname unsafe_NewArray reflect.unsafe_NewArray
+func unsafe_NewArray(rtype unsafe.Pointer, length int) unsafe.Pointer
+
+// typedslicecopy copies a slice of elemType values from src to dst,
+// returning the number of elements copied.
+//go:linkname typedslicecopy reflect.typedslicecopy
+//go:noescape
+func typedslicecopy(elemType unsafe.Pointer, dst, src sliceHeader) int
+
+//go:linkname mapassign reflect.mapassign
+//go:noescape
+func mapassign(rtype unsafe.Pointer, m unsafe.Pointer, key, val unsafe.Pointer)
+
+//go:linkname mapaccess reflect.mapaccess
+//go:noescape
+func mapaccess(rtype unsafe.Pointer, m unsafe.Pointer, key unsafe.Pointer) (val unsafe.Pointer)
+
+// m escapes into the return value, but the caller of mapiterinit
+// doesn't let the return value escape.
+//go:noescape
+//go:linkname mapiterinit reflect.mapiterinit
+func mapiterinit(rtype unsafe.Pointer, m unsafe.Pointer) *hiter
+
+//go:noescape
+//go:linkname mapiternext reflect.mapiternext
+func mapiternext(it *hiter)
+
+//go:linkname ifaceE2I reflect.ifaceE2I
+func ifaceE2I(rtype unsafe.Pointer, src interface{}, dst unsafe.Pointer)
+
+// A hash iteration structure.
+// If you modify hiter, also change cmd/internal/gc/reflect.go to indicate
+// the layout of this structure.
+type hiter struct {
+	key   unsafe.Pointer // Must be in first position.  Write nil to indicate iteration end (see cmd/internal/gc/range.go).
+	value unsafe.Pointer // Must be in second position (see cmd/internal/gc/range.go).
+	// rest fields are ignored
+}
+
+// add returns p+x.
+//
+// The whySafe string is ignored, so that the function still inlines
+// as efficiently as p+x, but all call sites should use the string to
+// record why the addition is safe, which is to say why the addition
+// does not cause x to advance to the very end of p's allocation
+// and therefore point incorrectly at the next block in memory.
+func add(p unsafe.Pointer, x uintptr, whySafe string) unsafe.Pointer {
+	return unsafe.Pointer(uintptr(p) + x)
+}
+
+// arrayAt returns the i-th element of p,
+// an array whose elements are eltSize bytes wide.
+// The array pointed at by p must have at least i+1 elements:
+// it is invalid (but impossible to check here) to pass i >= len,
+// because then the result will point outside the array.
+// whySafe must explain why i < len. (Passing "i < len" is fine;
+// the benefit is to surface this assumption at the call site.)
+func arrayAt(p unsafe.Pointer, i int, eltSize uintptr, whySafe string) unsafe.Pointer {
+	return add(p, uintptr(i)*eltSize, "i < len")
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_map.go b/vendor/github.com/modern-go/reflect2/unsafe_map.go
new file mode 100644
index 000000000..f2e76e6bb
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_map.go
@@ -0,0 +1,138 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeMapType struct {
+	unsafeType
+	pKeyRType  unsafe.Pointer
+	pElemRType unsafe.Pointer
+}
+
+func newUnsafeMapType(cfg *frozenConfig, type1 reflect.Type) MapType {
+	return &UnsafeMapType{
+		unsafeType: *newUnsafeType(cfg, type1),
+		pKeyRType:  unpackEFace(reflect.PtrTo(type1.Key())).data,
+		pElemRType: unpackEFace(reflect.PtrTo(type1.Elem())).data,
+	}
+}
+
+func (type2 *UnsafeMapType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafeMapType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	return *(*unsafe.Pointer)(ptr) == nil
+}
+
+func (type2 *UnsafeMapType) LikePtr() bool {
+	return true
+}
+
+func (type2 *UnsafeMapType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("MapType.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeMapType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	return packEFace(type2.rtype, *(*unsafe.Pointer)(ptr))
+}
+
+func (type2 *UnsafeMapType) Key() Type {
+	return type2.cfg.Type2(type2.Type.Key())
+}
+
+func (type2 *UnsafeMapType) MakeMap(cap int) interface{} {
+	return packEFace(type2.ptrRType, type2.UnsafeMakeMap(cap))
+}
+
+func (type2 *UnsafeMapType) UnsafeMakeMap(cap int) unsafe.Pointer {
+	m := makeMapWithSize(type2.rtype, cap)
+	return unsafe.Pointer(&m)
+}
+
+func (type2 *UnsafeMapType) SetIndex(obj interface{}, key interface{}, elem interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("MapType.SetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	keyEFace := unpackEFace(key)
+	assertType("MapType.SetIndex argument 2", type2.pKeyRType, keyEFace.rtype)
+	elemEFace := unpackEFace(elem)
+	assertType("MapType.SetIndex argument 3", type2.pElemRType, elemEFace.rtype)
+	type2.UnsafeSetIndex(objEFace.data, keyEFace.data, elemEFace.data)
+}
+
+func (type2 *UnsafeMapType) UnsafeSetIndex(obj unsafe.Pointer, key unsafe.Pointer, elem unsafe.Pointer) {
+	mapassign(type2.rtype, *(*unsafe.Pointer)(obj), key, elem)
+}
+
+func (type2 *UnsafeMapType) TryGetIndex(obj interface{}, key interface{}) (interface{}, bool) {
+	objEFace := unpackEFace(obj)
+	assertType("MapType.TryGetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	keyEFace := unpackEFace(key)
+	assertType("MapType.TryGetIndex argument 2", type2.pKeyRType, keyEFace.rtype)
+	elemPtr := type2.UnsafeGetIndex(objEFace.data, keyEFace.data)
+	if elemPtr == nil {
+		return nil, false
+	}
+	return packEFace(type2.pElemRType, elemPtr), true
+}
+
+func (type2 *UnsafeMapType) GetIndex(obj interface{}, key interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("MapType.GetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	keyEFace := unpackEFace(key)
+	assertType("MapType.GetIndex argument 2", type2.pKeyRType, keyEFace.rtype)
+	elemPtr := type2.UnsafeGetIndex(objEFace.data, keyEFace.data)
+	return packEFace(type2.pElemRType, elemPtr)
+}
+
+func (type2 *UnsafeMapType) UnsafeGetIndex(obj unsafe.Pointer, key unsafe.Pointer) unsafe.Pointer {
+	return mapaccess(type2.rtype, *(*unsafe.Pointer)(obj), key)
+}
+
+func (type2 *UnsafeMapType) Iterate(obj interface{}) MapIterator {
+	objEFace := unpackEFace(obj)
+	assertType("MapType.Iterate argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIterate(objEFace.data)
+}
+
+func (type2 *UnsafeMapType) UnsafeIterate(obj unsafe.Pointer) MapIterator {
+	return &UnsafeMapIterator{
+		hiter:      mapiterinit(type2.rtype, *(*unsafe.Pointer)(obj)),
+		pKeyRType:  type2.pKeyRType,
+		pElemRType: type2.pElemRType,
+	}
+}
+
+type UnsafeMapIterator struct {
+	*hiter
+	pKeyRType  unsafe.Pointer
+	pElemRType unsafe.Pointer
+}
+
+func (iter *UnsafeMapIterator) HasNext() bool {
+	return iter.key != nil
+}
+
+func (iter *UnsafeMapIterator) Next() (interface{}, interface{}) {
+	key, elem := iter.UnsafeNext()
+	return packEFace(iter.pKeyRType, key), packEFace(iter.pElemRType, elem)
+}
+
+func (iter *UnsafeMapIterator) UnsafeNext() (unsafe.Pointer, unsafe.Pointer) {
+	key := iter.key
+	elem := iter.value
+	mapiternext(iter.hiter)
+	return key, elem
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_ptr.go b/vendor/github.com/modern-go/reflect2/unsafe_ptr.go
new file mode 100644
index 000000000..8e5ec9cf4
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_ptr.go
@@ -0,0 +1,46 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafePtrType struct {
+	unsafeType
+}
+
+func newUnsafePtrType(cfg *frozenConfig, type1 reflect.Type) *UnsafePtrType {
+	return &UnsafePtrType{
+		unsafeType: *newUnsafeType(cfg, type1),
+	}
+}
+
+func (type2 *UnsafePtrType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafePtrType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	return *(*unsafe.Pointer)(ptr) == nil
+}
+
+func (type2 *UnsafePtrType) LikePtr() bool {
+	return true
+}
+
+func (type2 *UnsafePtrType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafePtrType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	return packEFace(type2.rtype, *(*unsafe.Pointer)(ptr))
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_slice.go b/vendor/github.com/modern-go/reflect2/unsafe_slice.go
new file mode 100644
index 000000000..1c6d876c7
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_slice.go
@@ -0,0 +1,177 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// sliceHeader is a safe version of SliceHeader used within this package.
+type sliceHeader struct {
+	Data unsafe.Pointer
+	Len  int
+	Cap  int
+}
+
+type UnsafeSliceType struct {
+	unsafeType
+	elemRType  unsafe.Pointer
+	pElemRType unsafe.Pointer
+	elemSize   uintptr
+}
+
+func newUnsafeSliceType(cfg *frozenConfig, type1 reflect.Type) SliceType {
+	elemType := type1.Elem()
+	return &UnsafeSliceType{
+		unsafeType: *newUnsafeType(cfg, type1),
+		pElemRType: unpackEFace(reflect.PtrTo(elemType)).data,
+		elemRType:  unpackEFace(elemType).data,
+		elemSize:   elemType.Size(),
+	}
+}
+
+func (type2 *UnsafeSliceType) Set(obj interface{}, val interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Set argument 1", type2.ptrRType, objEFace.rtype)
+	valEFace := unpackEFace(val)
+	assertType("Type.Set argument 2", type2.ptrRType, valEFace.rtype)
+	type2.UnsafeSet(objEFace.data, valEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer) {
+	*(*sliceHeader)(ptr) = *(*sliceHeader)(val)
+}
+
+func (type2 *UnsafeSliceType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	return (*sliceHeader)(ptr).Data == nil
+}
+
+func (type2 *UnsafeSliceType) SetNil(obj interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.SetNil argument 1", type2.ptrRType, objEFace.rtype)
+	type2.UnsafeSetNil(objEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeSetNil(ptr unsafe.Pointer) {
+	header := (*sliceHeader)(ptr)
+	header.Len = 0
+	header.Cap = 0
+	header.Data = nil
+}
+
+func (type2 *UnsafeSliceType) MakeSlice(length int, cap int) interface{} {
+	return packEFace(type2.ptrRType, type2.UnsafeMakeSlice(length, cap))
+}
+
+func (type2 *UnsafeSliceType) UnsafeMakeSlice(length int, cap int) unsafe.Pointer {
+	header := &sliceHeader{unsafe_NewArray(type2.elemRType, cap), length, cap}
+	return unsafe.Pointer(header)
+}
+
+func (type2 *UnsafeSliceType) LengthOf(obj interface{}) int {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.Len argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeLengthOf(objEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeLengthOf(obj unsafe.Pointer) int {
+	header := (*sliceHeader)(obj)
+	return header.Len
+}
+
+func (type2 *UnsafeSliceType) SetIndex(obj interface{}, index int, elem interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.SetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	elemEFace := unpackEFace(elem)
+	assertType("SliceType.SetIndex argument 3", type2.pElemRType, elemEFace.rtype)
+	type2.UnsafeSetIndex(objEFace.data, index, elemEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeSetIndex(obj unsafe.Pointer, index int, elem unsafe.Pointer) {
+	header := (*sliceHeader)(obj)
+	elemPtr := arrayAt(header.Data, index, type2.elemSize, "i < s.Len")
+	typedmemmove(type2.elemRType, elemPtr, elem)
+}
+
+func (type2 *UnsafeSliceType) GetIndex(obj interface{}, index int) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.GetIndex argument 1", type2.ptrRType, objEFace.rtype)
+	elemPtr := type2.UnsafeGetIndex(objEFace.data, index)
+	return packEFace(type2.pElemRType, elemPtr)
+}
+
+func (type2 *UnsafeSliceType) UnsafeGetIndex(obj unsafe.Pointer, index int) unsafe.Pointer {
+	header := (*sliceHeader)(obj)
+	return arrayAt(header.Data, index, type2.elemSize, "i < s.Len")
+}
+
+func (type2 *UnsafeSliceType) Append(obj interface{}, elem interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.Append argument 1", type2.ptrRType, objEFace.rtype)
+	elemEFace := unpackEFace(elem)
+	assertType("SliceType.Append argument 2", type2.pElemRType, elemEFace.rtype)
+	type2.UnsafeAppend(objEFace.data, elemEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeAppend(obj unsafe.Pointer, elem unsafe.Pointer) {
+	header := (*sliceHeader)(obj)
+	oldLen := header.Len
+	type2.UnsafeGrow(obj, oldLen+1)
+	type2.UnsafeSetIndex(obj, oldLen, elem)
+}
+
+func (type2 *UnsafeSliceType) Cap(obj interface{}) int {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.Cap argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeCap(objEFace.data)
+}
+
+func (type2 *UnsafeSliceType) UnsafeCap(ptr unsafe.Pointer) int {
+	return (*sliceHeader)(ptr).Cap
+}
+
+func (type2 *UnsafeSliceType) Grow(obj interface{}, newLength int) {
+	objEFace := unpackEFace(obj)
+	assertType("SliceType.Grow argument 1", type2.ptrRType, objEFace.rtype)
+	type2.UnsafeGrow(objEFace.data, newLength)
+}
+
+func (type2 *UnsafeSliceType) UnsafeGrow(obj unsafe.Pointer, newLength int) {
+	header := (*sliceHeader)(obj)
+	if newLength <= header.Cap {
+		header.Len = newLength
+		return
+	}
+	newCap := calcNewCap(header.Cap, newLength)
+	newHeader := (*sliceHeader)(type2.UnsafeMakeSlice(header.Len, newCap))
+	typedslicecopy(type2.elemRType, *newHeader, *header)
+	header.Data = newHeader.Data
+	header.Cap = newHeader.Cap
+	header.Len = newLength
+}
+
+func calcNewCap(cap int, expectedCap int) int {
+	if cap == 0 {
+		cap = expectedCap
+	} else {
+		for cap < expectedCap {
+			if cap < 1024 {
+				cap += cap
+			} else {
+				cap += cap / 4
+			}
+		}
+	}
+	return cap
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_struct.go b/vendor/github.com/modern-go/reflect2/unsafe_struct.go
new file mode 100644
index 000000000..804d91663
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_struct.go
@@ -0,0 +1,59 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeStructType struct {
+	unsafeType
+	likePtr bool
+}
+
+func newUnsafeStructType(cfg *frozenConfig, type1 reflect.Type) *UnsafeStructType {
+	return &UnsafeStructType{
+		unsafeType: *newUnsafeType(cfg, type1),
+		likePtr:    likePtrType(type1),
+	}
+}
+
+func (type2 *UnsafeStructType) LikePtr() bool {
+	return type2.likePtr
+}
+
+func (type2 *UnsafeStructType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeStructType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	if type2.likePtr {
+		return packEFace(type2.rtype, *(*unsafe.Pointer)(ptr))
+	}
+	return packEFace(type2.rtype, ptr)
+}
+
+func (type2 *UnsafeStructType) FieldByName(name string) StructField {
+	structField, found := type2.Type.FieldByName(name)
+	if !found {
+		return nil
+	}
+	return newUnsafeStructField(type2, structField)
+}
+
+func (type2 *UnsafeStructType) Field(i int) StructField {
+	return newUnsafeStructField(type2, type2.Type.Field(i))
+}
+
+func (type2 *UnsafeStructType) FieldByIndex(index []int) StructField {
+	return newUnsafeStructField(type2, type2.Type.FieldByIndex(index))
+}
+
+func (type2 *UnsafeStructType) FieldByNameFunc(match func(string) bool) StructField {
+	structField, found := type2.Type.FieldByNameFunc(match)
+	if !found {
+		panic("field match condition not found in " + type2.Type.String())
+	}
+	return newUnsafeStructField(type2, structField)
+}
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_type.go b/vendor/github.com/modern-go/reflect2/unsafe_type.go
new file mode 100644
index 000000000..13941716c
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_type.go
@@ -0,0 +1,85 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type unsafeType struct {
+	safeType
+	rtype    unsafe.Pointer
+	ptrRType unsafe.Pointer
+}
+
+func newUnsafeType(cfg *frozenConfig, type1 reflect.Type) *unsafeType {
+	return &unsafeType{
+		safeType: safeType{
+			Type: type1,
+			cfg:  cfg,
+		},
+		rtype:    unpackEFace(type1).data,
+		ptrRType: unpackEFace(reflect.PtrTo(type1)).data,
+	}
+}
+
+func (type2 *unsafeType) Set(obj interface{}, val interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Set argument 1", type2.ptrRType, objEFace.rtype)
+	valEFace := unpackEFace(val)
+	assertType("Type.Set argument 2", type2.ptrRType, valEFace.rtype)
+	type2.UnsafeSet(objEFace.data, valEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer) {
+	typedmemmove(type2.rtype, ptr, val)
+}
+
+func (type2 *unsafeType) IsNil(obj interface{}) bool {
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	return ptr == nil
+}
+
+func (type2 *unsafeType) UnsafeNew() unsafe.Pointer {
+	return unsafe_New(type2.rtype)
+}
+
+func (type2 *unsafeType) New() interface{} {
+	return packEFace(type2.ptrRType, type2.UnsafeNew())
+}
+
+func (type2 *unsafeType) PackEFace(ptr unsafe.Pointer) interface{} {
+	return packEFace(type2.ptrRType, ptr)
+}
+
+func (type2 *unsafeType) RType() uintptr {
+	return uintptr(type2.rtype)
+}
+
+func (type2 *unsafeType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeIndirect(obj unsafe.Pointer) interface{} {
+	return packEFace(type2.rtype, obj)
+}
+
+func (type2 *unsafeType) LikePtr() bool {
+	return false
+}
+
+func assertType(where string, expectRType unsafe.Pointer, actualRType unsafe.Pointer) {
+	if expectRType != actualRType {
+		expectType := reflect.TypeOf(0)
+		(*iface)(unsafe.Pointer(&expectType)).data = expectRType
+		actualType := reflect.TypeOf(0)
+		(*iface)(unsafe.Pointer(&actualType)).data = actualRType
+		panic(where + ": expect " + expectType.String() + ", actual " + actualType.String())
+	}
+}