chore(vendor): upgrade gin repo (#249)

vendor/github.com/gin-gonic/gin/binding/binding.go

@@ -48,19 +48,19 @@ var (
 func Default(method, contentType string) Binding {
 	if method == "GET" {
 		return Form
-	} else {
-		switch contentType {
-		case MIMEJSON:
-			return JSON
-		case MIMEXML, MIMEXML2:
-			return XML
-		case MIMEPROTOBUF:
-			return ProtoBuf
-		case MIMEMSGPACK, MIMEMSGPACK2:
-			return MsgPack
-		default: //case MIMEPOSTForm, MIMEMultipartPOSTForm:
-			return Form
-		}
+	}
+
+	switch contentType {
+	case MIMEJSON:
+		return JSON
+	case MIMEXML, MIMEXML2:
+		return XML
+	case MIMEPROTOBUF:
+		return ProtoBuf
+	case MIMEMSGPACK, MIMEMSGPACK2:
+		return MsgPack
+	default: //case MIMEPOSTForm, MIMEMultipartPOSTForm:
+		return Form
 	}
 }
 

vendor/github.com/gin-gonic/gin/binding/default_validator.go

@@ -1,3 +1,7 @@
+// Copyright 2017 Manu Martinez-Almeida.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
 package binding
 
 import (

vendor/github.com/gin-gonic/gin/binding/form_mapping.go

@@ -153,6 +153,11 @@ func setTimeField(val string, structField reflect.StructField, value reflect.Val
 		return errors.New("Blank time format")
 	}
 
+	if val == "" {
+		value.Set(reflect.ValueOf(time.Time{}))
+		return nil
+	}
+
 	l := time.Local
 	if isUTC, _ := strconv.ParseBool(structField.Tag.Get("time_utc")); isUTC {
 		l = time.UTC

vendor/github.com/gin-gonic/gin/binding/json.go

@@ -5,9 +5,14 @@
 package binding
 
 import (
-	"encoding/json"
-
 	"net/http"
+
+	"github.com/json-iterator/go"
+)
+
+var (
+	json                   = jsoniter.ConfigCompatibleWithStandardLibrary
+	EnableDecoderUseNumber = false
 )
 
 type jsonBinding struct{}
@@ -18,6 +23,9 @@ func (jsonBinding) Name() string {
 
 func (jsonBinding) Bind(req *http.Request, obj interface{}) error {
 	decoder := json.NewDecoder(req.Body)
+	if EnableDecoderUseNumber {
+		decoder.UseNumber()
+	}
 	if err := decoder.Decode(obj); err != nil {
 		return err
 	}

vendor/github.com/gin-gonic/gin/binding/protobuf.go

@@ -5,10 +5,10 @@
 package binding
 
 import (
-	"github.com/golang/protobuf/proto"
-
 	"io/ioutil"
 	"net/http"
+
+	"github.com/golang/protobuf/proto"
 )
 
 type protobufBinding struct{}