Allow to check specific TYPO3 Upgrade parts / Versions
Currently all sniffs and configs will be applied.
Still it's possible to configure the configuration folders / globing.
We have to check whether that's enough, and provide ready to use
ruleset.xml files for each TYPO3 version. So you can use different PHPCS Standards.
Another solution might be the same way as done by https://github.com/wimg/PHPCompatibility#using-the-compatibility-sniffs using a
runtime-set to define the versions.