DBAL4 changes

[michnovka]

Supersedes #228

[michnovka]

Hi @ogizanagi , I have made a version which should allow us to use Doctrine 3 and DBAL 4 without the need to explicitly maintain 2 versions.

I do have some PHPStan issues because of that, as I had to use some code dynamically based on class_exists to differentiate between DBAL3 and DBAL4. I am not experienced with PHPStan exceptions, so can you please take it up from here, create these exceptions (as these errors are expected) and review my code?

Thanks!

[ogizanagi]

@michnovka : that's awesome 💖 and a weird coincidence ; I was about to start this exactly today. So thank you very much for saving me this work and I'll look at it in the next days 🙏🏻

[ogizanagi]

Thanks @michnovka.