Fix composer to only allow DBAL 2.4 DEV and larger
DDC-2192 - Prevent using append flag in case of where and having to avoid user confusion, because this is not allowed.
DDC-1698 - Prepend autoloader to stack and fix CS
DDC-1698 - Allow autoload registration from a Configuration instance
Ensure onFlush and postFlush events are always raised
No huge if clause
DDC-2173 - Add Test for new OnFlush or PreFlush behavior and update UPGRADE.md
Merge branch 'DDC-2173'
DDC-2173 - Correct issue is about "postFlush" not "preFlush" and add test