Drupal 11 compatibility

It's hard for me to tell when you're going to be able to produce a new
release of this module that fully satisfies the upgrade_status module report.
It will need both the change to the yml file and what is in this merge request too:
nicolasgraph opened merge request !5
Fixes user_role_names() deprecation

Just as a reference I've produced a patch that satisfies both of these things.
I'm not trying to replace the work you seem to have almost ready but just in
case this might help. (see scn.patch file). Since we're trying to prepare for Drupal 11
for now we're using our patch but we would prefer to use your new fixed version
when it is available.