* update test

Maven does not like for plugins to have transitive Maven dependencies
Update plugin dependencies

* there is no reason to make this metadata mandatory since the import will fallback on the effective author

   * Minor coverage change after the move to Java 11

  * Minor coverage change after the move to Java 11

* remove unused import

* Fix test to consider no-longer deprecated elements.

* Cleanup some comments and introduce a helper to check if the configuration is HTML5.
* Allow b, i, u and s tags in HTML 5 as they are not obsolete in HTML 5 (and i is in fact frequently used for icons).
* Add XWikiHTML5TagProvider to fix svg and style tag handling.
* Fix class fan-out complexity in DefaultHTMLCleaner by not using the CleanerTransformations class but only our subclass.

* Fix SonarLint blocker by copying the parent tests instead of calling them.

  * also catch IllegalArgumentException since Tomcat might throw them
    when trying to resolve a bad path

  * Ensure to normalize URLs when calling ServletEnvironment#getResource

* Fix case of HTML5 doctype, see https://github.com/whatwg/html/blob/main/FAQ.md#what-is-the-doctype-for-modern-html-documents