Upgrade to php 84

[krchiper]

This PR is based on PR #114 (Fix ci pipeline) and therefore includes the same fixes as that

Psalm drives alot of conflicting packages into this one, so the conflict section in composer.json is growing

Code coverage hint for ExceptionDetailsTraitTest has been removed as I can't get it to work with both php 8.1 -> 8.4

// #[CoversTrait(ExceptionDetailsTrait::class)]  <--- needed by phpunit 12
// #[CoversClass(ExceptionDetailsTrait::class)]  <--- needed by phpunit 10 + 11
final class ExceptionDetailsTraitTest extends TestCase

Psalm upgraded to latest version and fixes applied to code base

[krchiper]

Can you approve checks?

[delatrie]

Hi, @krchiper !
Thank you for your contribution. I have a couple of things to fix before releasing it. Hopefully, it won't take long.

[glo71317]

@delatrie Thank you for adding the support! When can we expect the stable version to be released?

[delatrie]

@glo71317 It has just been released as 3.1.0.