[BUG] JSONPath.set()空指针异常

[mimajiushi]

提到内部issues了: https://code.alibaba-inc.com/shaojin.wensj/fastjson2/issues#openWorkitem=558912

版本2.0.44，简易示例代码如下：

    public static void main(String[] args) throws Exception {
        String testJson = "{\"key2\": [null, null, null, null, null, null]}";
        Object jsonObject = JSON.parse(testJson);
        Object eval = JSONPath.eval(jsonObject, "$");
        System.out.println(eval);
        JSONPath.set(eval, "$..key3", "value2");
        System.out.println(eval);
    }

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.45
问题已修复，请用新版本