refactor: support AbortWithStatusJSON (#200)

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

@@ -8,6 +8,7 @@ import "net/http"
 
 type Render interface {
 	Render(http.ResponseWriter) error
+	WriteContentType(w http.ResponseWriter)
 }
 
 var (
@@ -21,6 +22,8 @@ var (
 	_ HTMLRender = HTMLDebug{}
 	_ HTMLRender = HTMLProduction{}
 	_ Render     = YAML{}
+	_ Render     = MsgPack{}
+	_ Render     = MsgPack{}
 )
 
 func writeContentType(w http.ResponseWriter, value []string) {