Drupal 11 compatibility

I attached the latest patch from the MR.

1) Drupal 8 reached its EOL; so we can avoid its requirements.
A new arrow function syntax was introduced in PHP 7.4. So I bet it's okay to use the arrow syntax here.

2) I bet Role::loadMultiple should be replaced with entityTypeManager->getStorage('user_role')->loadMultiple();. Still, this is not a blocker here.

I'm going to merge those changes in the nearest weeks + create a new issue to have ci-cd for coding standards checks later.
Then, if no one object here, altogether will be released as a new 1.4 release of this module.

Thanks!

Merged. The changes will be a part of the next module release. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.