Compatibility with TYPO3 13

[Starkmann]

We will be working on TYPO3 13 compatibility soon.

Are you planing to have a 12 and 13 compatible version, or will 13 be an extra version.

[liayn]

I'd be happy to have a version compatible v11 to v13, if doable.

[liayn]

So maybe can we combine this with #130 ?

[xperseguers]

Yes, I ensure "my" extensions are compatible with (at least) 2 LTS, more is even better, moreover for such kind of extensions where some extended support is best due to their usage in environments where updates are always more complex and a bit slower.