chore: add tests for PHP 8.4

[Chris53897]

No description provided.

[Hanmac]

@Chris53897 the composer-unused as phar tool is problematic

The message is a lie:

Your Composer dependencies require a PHP version ">= 8.2.0". You are running (Version).

Because it isn't the composer dependencies, it's the phar itself that throwing the Error.

Code from the Phar:

if (!(PHP_VERSION_ID >= 80200)) {
    $issues[] = 'Your Composer dependencies require a PHP version ">= 8.2.0". You are running ' . PHP_VERSION . '.';
}

it would be better if the tool would be installed as dev dependency:
composer require --dev icanhazstring/composer-unused

[Hanmac]

@loevgaard might need to look into this

[Chris53897]

I think Static Code Analyse should only run on the lowest Supported PHP Version. That is what I See on most repos . I did no take a deeper Look in the code yet.

[Hanmac]

I will try to update the workflow with a different PR tomorrow