Check compatibility to Doctrine Migrations 3.x

[andreaswolf]

We should evaluate if Doctrine Migrations 3.x can be used (maybe with more recent TYPO3 versions than 9.x that we originally used for developing most of this ext).

[andreaswolf]

As of now, the most recent version of Doctrine Migrations on packagist.org is 3.6.0. This requires doctrine/dbal 3.5.1+ and PHP 8.1+.

TYPO3 12.4.4 requires PHP 8.1+ as well and doctrine/dbal 3.6.2. However, 11.5.30 still supports PHP 7.4 and 8.0 (which is not that bad, since we can still be stricter IMO), but it also requires doctrine/dbal 2.13.
I would definitely drop support for PHP 7.4, since it is not supported by the PHP project anymore, and there is the 0.11 release that still supports this version.

The last version of doctrine/migrations 3.x that supports DBAL 2.x is 3.4.x. So IMO we should raise the requirement to doctrine/migrations ^3.4.2, since the runtime dependencies for that version are identical to those of 3.4.0 and 3.4.1.

This would then be a new 0.12 release of this extension, which supports TYPO3 11 and 12. As soon as 13 hits the road, we can then drop support for PHP 8.0 and raise the doctrine/migrations requirement to 3.6.0 or even newer versions.

tl;dr: We create an 0.12 release that supports PHP 8.0+ only and requires doctrine/migrations 3.4.2+.