Adopt PHP 8.1-only capabilities such as constructor property promotion + drop BC layers

Per his activity in Slack, I'm pretty sure @phenaproxima is eager to take this on 🤓

The requirements changes are already happening in 📌 Update requirements for 3.x Fixed . Retitling to clarify scope of this issue.

We can work on these 2 in parallel, so not postponing this.

161 additions, 2612 deletions! 🎉

I made the following changes:

• With the lone exception of ComposerUtility (which we're transitioning away from), everything that was deprecated has been removed.
• I used constructor property promotion everywhere I could. This meant removing a lot of duplicated doc comments and boilerplate. Beautiful.
• Caught exceptions that didn't use the actual exception object were converted to non-capturing catches.
• Injected properties that conflict with properties defined in traits (MessengerTrait, StringTranslationTrait) were removed in favor of using the trait methods.

EPIC stats!

This will break most in-progress MRs though 😅 Including the exception architecture one. OTOH, landing this now will also ensure that in-progress MRs can shed a lot of their cruft and have plenty of examples…

@phenaproxima I think you missed @heddn's remark that I +1'd: https://git.drupalcode.org/project/automatic_updates/-/merge_requests/70.... Spotted 2 other patterns too. Pretty sure you'll love doing these! 😁

All feedback is addressed.

I went over this with @tedbow in Zoom and he felt it was pretty good. Assigning to him for final review and (hopefully) commit.

re #21 I looked at the commits since the zoom and everything looks good!

Great to get this in

@phenaproxima you wrote

Having said that, I do think it makes sense to make it protected readonly in StageEvent. In another issue, we should convert it to public readonly and remove getStage() 🎉

Can you please create that follow-up issue?

Done: ✨ Make StageEvent::$stage a public readonly property, and remove getStage() Fixed .

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