vendor the latest json-iterator

vendor/github.com/json-iterator/go/reflect_native.go

@@ -1,7 +1,6 @@
 package jsoniter
 
 import (
-	"bytes"
 	"encoding/base64"
 	"reflect"
 	"strconv"
@@ -418,20 +417,11 @@ func (codec *base64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	}
 	switch iter.WhatIsNext() {
 	case StringValue:
-		encoding := base64.StdEncoding
-		src := iter.SkipAndReturnBytes()
-		// New line characters (\r and \n) are ignored.
-		// Refer to https://golang.org/pkg/encoding/base64/#Encoding.Decode
-		src = bytes.Replace(src, []byte(`\r`), []byte{}, -1)
-		src = bytes.Replace(src, []byte(`\n`), []byte{}, -1)
-		src = src[1 : len(src)-1]
-		decodedLen := encoding.DecodedLen(len(src))
-		dst := make([]byte, decodedLen)
-		len, err := encoding.Decode(dst, src)
+		src := iter.ReadString()
+		dst, err := base64.StdEncoding.DecodeString(src)
 		if err != nil {
 			iter.ReportError("decode base64", err.Error())
 		} else {
-			dst = dst[:len]
 			codec.sliceType.UnsafeSet(ptr, unsafe.Pointer(&dst))
 		}
 	case ArrayValue: