TYPO3 Version 13 compatibility

Make t3am work with TYPO3 13 again

## Early Access Programm for TYPO3 13 support

:information_source: **TYPO3 13 compatibility**
> See [EAP page (DE)](https://www.in2code.de/agentur/typo3-extensions/early-access-programm/) or
> [EAP page (EN)](https://www.in2code.de/en/agency/typo3-extensions/early-access-program/) for more information how
> to get access to a TYPO3 13 version