GitLab

While, the version constraints work with _minimum_ versions, I'd recommend upping those minimum versions of various CI tools to ensure that PHP 8.1 compatible versions of the tooling will be installed.

Refs:
* https://github.com/php-parallel-lint/PHP-Parallel-Lint/releases
* https://github.com/mockery/mockery/releases
* https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-9.5.md