TYPO3 Version 13 compatibility

[sbusemann]

Make powermail_cleaner work with TYPO3 13 again

Early Access Programm for TYPO3 13 support

ℹ️ TYPO3 13 compatibility

See EAP page (DE) or
EAP page (EN) for more information how
to get access to a TYPO3 13 version