Bump xmltodict from 0.12.0 to 0.13.0

Bumps [xmltodict](https://github.com/martinblech/xmltodict) from 0.12.0 to 0.13.0.
- [Changelog](https://github.com/martinblech/xmltodict/blob/master/CHANGELOG.md)
- [Commits](martinblech/xmltodict@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: xmltodict
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,2 +1,2 @@
-xmltodict==0.12.0
+xmltodict==0.13.0
 python-jenkins==1.7.0