xml数据转json

[xml2json.js使用文档](https://www.hangge.com/blog/cache/detail_1798.html)
eg:
import X2JS from  './xml2json'
const x2js = new X2JS();
const data='<?xml version="1.0" encoding="UTF-8" ?>
	<code>1</code>
	<message>success</message>
	<data></data>'
const XMLTOJSON=x2js.xml_str2json(data);