[!!!][TASK] Add compatibilty for TYPO3 13
Breaking-Changes:
* removed support for TYPO3 11
* removed support for TYPO3 12
Tasks:
* Initial upgrade
* setup dev environment
* rector upgrades
* Internalize Algorithm DataHandler::isTableAllowedForThisPage because this became protected
* removing TYPO3 11 code
* phpstan lvl 8
* update version number
* Update ext_emconf.php
* added better baseline
* Update README.md
Resolves: #56
Filter for TYPO3 versions
Breaking-Changes:
* removed support for TYPO3 11
* removed support for TYPO3 12
Tasks:
* Initial upgrade
* setup dev environment
* rector upgrades
* Internalize Algorithm DataHandler::isTableAllowedForThisPage because this became protected
* removing TYPO3 11 code
* phpstan lvl 8
* update version number
* Update ext_emconf.php
* added better baseline
* Update README.md
Resolves: #56