Bump xmlunit.version from 2.6.4 to 2.7.0
Bump xmlunit.version from 2.6.4 to 2.7.0

Bumps `xmlunit.version` from 2.6.4 to 2.7.0.

Updates `xmlunit-core` from 2.6.4 to 2.7.0
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.6.4...v2.7.0)

Updates `xmlunit-matchers` from 2.6.4 to 2.7.0
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.6.4...v2.7.0)

Updates `xmlunit-legacy` from 2.6.4 to 2.7.0
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.6.4...v2.7.0)

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