New feature, bugfixes and minor improvements
[FEATURE] Add registration tables to TYPO3 garbage collection task #1019
[BUGFIX] Default value must be a string #1024 - thanks @georgringer
[BUGFIX] Conditionally register rtehtmlarea_images softref #1026
[TASK] Increase phpstan checks to level 6 #1014
[TASK] Hide tables in list view #1023 - thanks @georgringer
[TASK] Simplify preview renderer] - thanks @georgringer
[TASK] Use FormDataProvider for default startdate and enddate #1020
[TASK] Make link field nullable #1028
[TASK] Show registrations in list view #1023
[TASK] Remove empty default cases in switch statements
[TASK] Remove superfluous comment in CustomNotificationLogRepository
[TASK] Use symfony console constants #1021
[TASK] Remove CSH language files #999