Some unit tests are failing on Drupal 11.x, will be good to fix them.
Fixed
1.4
Code
I reworked problematic stubs to work well with Drupal 10 and Drupal 11 together. But have to drop support for Drupal 9.x and PHP 7.4, to simplify the code.
Issue #3456236 by Murz: Fix unit tests for Drupal 11.x