fix UT: \u0000 is not allowed in some version

Author: blahgeek

tests/bytecode_test.rs

@@ -50,7 +50,7 @@ fn run_one_test(json_str: &str, object_type: bytecode::ObjectType) -> Result<()>
 #[test]
 fn test_bytecode() {
     // unicode test
-    run_one_test(r#"{"a":"ÀÁÂÃÄÅÆÇÈÉÊËÌ\u0000 abcd \n 你好世界"}"#, bytecode::ObjectType::Plist).unwrap();
+    run_one_test(r#"{"a":"ÀÁÂÃÄÅÆÇÈÉÊËÌ abcd \n 你好世界"}"#, bytecode::ObjectType::Plist).unwrap();
 
     for object_type in vec![bytecode::ObjectType::Plist,
                             bytecode::ObjectType::Alist,