Add checks for deprecated / breaking signals and hooks
Sometimes signals are removed or changed, this should be possible to check in registration.
Signals
- https://docs.typo3.org/typo3cms/extensions/core/7.6/Changelog/7.2/Breaking-65939-BackendLoginRefactoring.html
- https://docs.typo3.org/typo3cms/extensions/core/7.6/Changelog/7.3/Breaking-62983-PostProcessMirrorUrlSignalHasMoved.html
- https://docs.typo3.org/typo3cms/extensions/core/7.6/Changelog/7.4/Breaking-67545-PreFileAddSignalBehaviourChanged.html