Prepare 6.3.1 release #421

Job	Run time
Coding style	17s
PHPStan (PHP 7.4, Symfony 4.4.* + highest deps)	28s
PHPStan (PHP 7.4, Symfony 5.4.* + highest deps)	33s
PHPStan (PHP 8.1, Symfony 4.4.* + highest deps)	41s
PHPStan (PHP 8.1, Symfony 5.4.* + highest deps)	34s
PHPStan (PHP 8.1, Symfony 6.2.* + highest deps)	26s
PHPStan (PHP 8.2, Symfony 4.4.* + highest deps)	33s
PHPStan (PHP 8.2, Symfony 5.4.* + highest deps)	29s
PHPStan (PHP 8.2, Symfony 6.2.* + highest deps)	42s
PHPStan (PHP 7.4, Symfony 4.4.* + lowest deps)	41s
PHPUnit (PHP 7.4, Symfony 4.4.* + highest deps, ES 7.11.0)	1m 12s
PHPUnit (PHP 7.4, Symfony 5.4.* + highest deps, ES 7.11.0)	1m 8s
PHPUnit (PHP 8.1, Symfony 4.4.* + highest deps, ES 7.11.0)	1m 6s
PHPUnit (PHP 8.1, Symfony 5.4.* + highest deps, ES 7.11.0)	1m 30s
PHPUnit (PHP 8.1, Symfony 6.2.* + highest deps, ES 7.11.0)	1m 9s
PHPUnit (PHP 8.2, Symfony 4.4.* + highest deps, ES 7.11.0)	1m 9s
PHPUnit (PHP 8.2, Symfony 5.4.* + highest deps, ES 7.11.0)	1m 11s
PHPUnit (PHP 8.2, Symfony 6.2.* + highest deps, ES 7.11.0)	1m 4s
PHPUnit (PHP 7.4, Symfony 4.4.* + lowest deps, ES 7.0.0)	57s
	15m 50s

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