Bump xmlunit-core from 2.6.3 to 2.8.2
Bump xmlunit-core from 2.6.3 to 2.8.2

Bumps [xmlunit-core](https://github.com/xmlunit/xmlunit) from 2.6.3 to 2.8.2.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.6.3...v2.8.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eXist-db/messaging-replication,eXist-db/messaging-replication,dizzzz/messaging-replication,eXist-db/messaging-replication,dizzzz/messaging-replication,dizzzz/messaging-replication