xstream代码安全升级

[baisui1981]

老本有安全风险： https://x-stream.github.io/CVE-2020-26217.html 会升级到：

 <dependency>
       <groupId>com.thoughtworks.xstream</groupId>
       <artifactId>xstream</artifactId>
       <version>1.4.19</version>
</dependency>