Make compatible with Symfony 6.4

[dlee-dayspring]

Ran Rector and updated code to be compatible with Symfony 6.4 and PHP 8.1 (required by Symfony 6.4). Also added deprecations to dependencies on sensio/framework-extra-bundle as far as I can tell. This can be seen in PropelParamConverter.php, param_converter.markdown, PropelParamConverterTest.php.

[jwong-dayspring]

This forces Symfony 6.4 syntax even though the composer.json requirements state ^6.0.

I created #17 which re-ran the rector updates with only:

        LevelSetList::UP_TO_PHP_80,
        SymfonySetList::SYMFONY_54,
        SymfonySetList::SYMFONY_60,