Bug fixes

Changes since 8.x-2.4:

Full compatibility for Drupal 8, 9 and bugfixing

In preparation to the release of Drupal 9, the module has been reviewed and tested with the new version to ensure a full coverage. The documentation has been updated and some deprecated code has been replaced among some other improvements and fixes.

Issues we worked on:

* editing referenced nodes and entities is now supported
* code cleanup

• As PAReview recommendation use dependency injection for t classes.

• More Clean up and coding standards.