ci: Add tests for PHP 8.4

[Chris53897]

[alamirault]

https://github.com/vimeo/psalm/pull/10928#issuecomment-2495941226 will be available "the next week."

(I can't unapprove now)

[egulias]

Hi @Chris53897 thanks for your PR. I have fixed the checks so please update with the latest code to have the checks pass. Also, I believe that many deps are still not there for PHP8.4 but please double check. Thanks!

[egulias]

Looks like at least psalm version needs to be bumped up.

[Chris53897]

i rebased now. Yes, we still ned to wait for vimeo

[egulias]

Thanks! Will wait for them then.

[egulias]

This will look awful... but I can't find where to re-run the checks!

[Chris53897]

You can just close and reopen this PR. CI will run again

[codacy-production[bot]]

Coverage summary from Codacy

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Coverage variation	Diff coverage
Report missing for dcf8f79c410bb3906c915136369465bebead5990[^1]	:white_check_mark: ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (dcf8f79c410bb3906c915136369465bebead5990)	Report Missing	Report Missing	Report Missing
Head commit (ca3a4761be59ec8a6c09c12437cf38fbac6306fc)	716	657	91.76%

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Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#390)	0	0	∅ (not applicable)

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_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more} [^1]: Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct.

[Chris53897]

"Just" 200 Errors from upgrading psalm. Should i create a baseline and ignore them?

[egulias]

I guess we should fix them? I agree with final and have mixed feelings with override, which are basically the two things generating the 200 errors.

[Chris53897]

@egulias Should i add the Override Attribute?