Config form class error

Here's a patch that adds the parameter type and makes it non-nullable.

Tested in Drupal 10.3.8 and get the following:

PHP Fatal error: Type of Drupal\accessible_menu\Form\SettingsForm::$typedConfigManager must not be defined (as in class Drupal\Core\Form\ConfigFormBase) in /var/www/html/web/modules/contrib/accessible_menu/src/Form/SettingsForm.php on line 17

We'll need to figure out a way to make this work in both 10 and 11.

Just noticed this:
https://www.drupal.org/node/3404140 →

Don't apply this patch if you're on D10, it will break.

classiccut → changed the visibility of the branch 1.x to hidden.

The fix works in both D10 and D11 now.