Fix deprecations for PHP 8.4

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

@rlhawk thanks for committing this! Can you make a new release?

Here is the patch file for composer patches in the meantime.

Thanks !

For those who need the patch before the next release, you can use the following link:
https://git.drupalcode.org/project/key/-/commit/9438c1e369eb58482d78e43a....
Add it to your composer.json file instead of downloading the patch to your project.