:arrow_up: Bump xstream in /others/weixin-java-osgi (#1933)
:arrow_up: Bump xstream in /others/weixin-java-osgi (#1933)

Bumps [xstream](https://github.com/x-stream/xstream) from 1.4.13-java7 to 1.4.15.
- [Release notes](https://github.com/x-stream/xstream/releases)
- [Commits](https://github.com/x-stream/xstream/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
Wechat-Group/WxJava,Wechat-Group/WxJava