Modernize codebase & add tests

Okay, MR added and ready for review.

Thanks for this. I will review it shortly. If this goes through, I’m thinking of creating a 2.x branch as we’re dropping support for older versions and adding support for newer ones.

I haven’t checked the code in detail yet, but if we require a minimum version of PHP to leverage the new language features we should add that requirement to the composer file too.

Yea, I think we're good at just requiring Drupal 10, which requires PHP 8.1 already. I don't think I used any language features beyond 8.1.

I just created the 2.x branch and moved the target branch of the MR to be that. I left some feedback on the MR, really minimal, and answer the question in the `@todo`. Feel free to do something about it here or in a follow-up.

The code looks really good and it'd be ready to merge into a 2.x branch.

I'll let you see the feedback first before marking it RTBC. Great job!

Thanks for the review! I addressed the feedback and pushed.

Small error in "phpcs". Once fixed, it can go directly into RTBC.

Fixed! Once this is merged, I can start work on the other two issues I created.

The MR is merged now. Thanks a lot for the improvements so far! Looking forward to reviewing more issues.

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