chore: update golang version

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

@@ -0,0 +1,36 @@
+// Copyright 2014 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 (
+	"io/ioutil"
+	"net/http"
+
+	"github.com/golang/protobuf/proto"
+)
+
+type protobufBinding struct{}
+
+func (protobufBinding) Name() string {
+	return "protobuf"
+}
+
+func (b protobufBinding) Bind(req *http.Request, obj interface{}) error {
+	buf, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		return err
+	}
+	return b.BindBody(buf, obj)
+}
+
+func (protobufBinding) BindBody(body []byte, obj interface{}) error {
+	if err := proto.Unmarshal(body, obj.(proto.Message)); err != nil {
+		return err
+	}
+	// Here it's same to return validate(obj), but util now we can't add
+	// `binding:""` to the struct which automatically generate by gen-proto
+	return nil
+	// return validate(obj)
+}