add internal package which includes json package (#1504)

binding/json.go

@@ -9,7 +9,7 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/gin-gonic/gin/json"
+	"github.com/gin-gonic/gin/internal/json"
 )
 
 // EnableDecoderUseNumber is used to call the UseNumber method on the JSON

errors.go

@@ -9,7 +9,7 @@ import (
 	"fmt"
 	"reflect"
 
-	"github.com/gin-gonic/gin/json"
+	"github.com/gin-gonic/gin/internal/json"
 )
 
 type ErrorType uint64

errors_test.go

@@ -8,7 +8,7 @@ import (
 	"errors"
 	"testing"
 
-	"github.com/gin-gonic/gin/json"
+	"github.com/gin-gonic/gin/internal/json"
 	"github.com/stretchr/testify/assert"
 )
 

render/json.go

@@ -10,7 +10,7 @@ import (
 	"html/template"
 	"net/http"
 
-	"github.com/gin-gonic/gin/json"
+	"github.com/gin-gonic/gin/internal/json"
 )
 
 type JSON struct {

render/json_17.go

@@ -9,7 +9,7 @@ package render
 import (
 	"net/http"
 
-	"github.com/gin-gonic/gin/json"
+	"github.com/gin-gonic/gin/internal/json"
 )
 
 type PureJSON struct {