Update msgpack library

engine/storage_interface.go

@@ -287,6 +287,7 @@ type CodecMsgpackMarshaler struct {
 func NewCodecMsgpackMarshaler() *CodecMsgpackMarshaler {
 	cmm := &CodecMsgpackMarshaler{new(codec.MsgpackHandle)}
 	mh := cmm.mh
+	mh.TimeNotBuiltin = true
 	mh.MapType = reflect.TypeOf(map[string]interface{}(nil))
 	mh.RawToString = true
 	return cmm