chore(deps-dev): bump xmldiff from 2.6.1 to 2.6.3 (#388)

Bumps [xmldiff](https://github.com/Shoobx/xmldiff) from 2.6.1 to 2.6.3.
- [Release notes](https://github.com/Shoobx/xmldiff/releases)
- [Changelog](https://github.com/Shoobx/xmldiff/blob/master/CHANGES.rst)
- [Commits](Shoobx/xmldiff@2.6.1...2.6.3)

---
updated-dependencies:
- dependency-name: xmldiff
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]