Upgrade composer.json to allow PHP 8.4

[RalfEggert]

Add PHP 8.4 version for #42

[froschdesign]

@RalfEggert
The problem here is Psalm.

Please extend the file .laminas-ci.json:

{
    "ignore_php_platform_requirements": {
        "8.4": true
    },
    "backwardCompatibilityCheck": true
}

[RalfEggert]

@froschdesign

Ok, is it better?

[nicklog]

I would be very grateful if something could be done here :)

[mimmi20]

@RalfEggert Could you solve these issues?

[froschdesign]

The issues are listed in the checks:

• https://github.com/laminas/laminas-psr7bridge/actions/runs/12121973606/job/33794124248?pr=43
• https://github.com/laminas/laminas-psr7bridge/actions/runs/12121973606/job/33794117910?pr=43

There is also a hint:

Psalm can automatically fix 13 of these issues.
Run Psalm again with 
--alter --issues=InvalidReturnType,MissingReturnType,PossiblyUnusedMethod --dry-run
to see what it can fix.

[gsteel]

Closed via #46