ci: Add PHP 8.3 and 8.4 to the CI #111

Job	Run time
php-cs-fixer (8.2, highest)	14s
PHPUnit (PHP 8.2) Symfony unchanged	41s
PHPUnit (PHP 8.2) Symfony 6.4.*	43s
PHPUnit (PHP 8.2) Symfony 7..	35s
PHPUnit (PHP 8.2) Symfony unchanged	44s
PHPUnit (PHP 8.2) Symfony 6.4.*	34s
PHPUnit (PHP 8.2) Symfony 7..	42s
PHPUnit (PHP 8.3) Symfony unchanged	42s
PHPUnit (PHP 8.3) Symfony 6.4.*	38s
PHPUnit (PHP 8.3) Symfony 7..	47s
PHPUnit (PHP 8.3) Symfony unchanged	40s
PHPUnit (PHP 8.3) Symfony 6.4.*	40s
PHPUnit (PHP 8.3) Symfony 7..	36s
PHPUnit (PHP 8.4) Symfony unchanged	37s
PHPUnit (PHP 8.4) Symfony 6.4.*	34s
PHPUnit (PHP 8.4) Symfony 7..	41s
PHPUnit (PHP 8.4) Symfony unchanged	37s
PHPUnit (PHP 8.4) Symfony 6.4.*	35s
PHPUnit (PHP 8.4) Symfony 7..	37s
Tests status	1s
	11m 58s

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