Info Drops 8 and 9, adds 11
Closes #3491720, if accepted.
Tested locally on Drupal 11 install, and the module loaded and functioned without need for patching, Drupal Lenient or backwards_compatibility
Completes Drupal 11 fixes along with 3491477 & 3482010 https://www.drupal.org/project/responsive_menus/issues/3491477 https://www.drupal.org/project/responsive_menus/issues/3482010