Added:
- Compatibility with TYPO3 v13

Removed:
- Compatibility with TYPO3 v11
- Language variables {__language.twoLetterIsoCode} and {__language.direction}

See also upgrade section in the docs:
https://docs.typo3.org/p/jobrouter/typo3-base/4.0/en-us/Upgrade/Index.html