Version 4.2.3.4

- [CalDAV] fix issue that occured because of time zone renaming Europe/Kiev → Europe/Kyiv 🇺🇦✊
- [CalDAV] don't validate email addresses of attendees strictly
- [CalDAV] fix parsing of empty colors
- [jtx Board] increase compatibility and bug fixes

Version 4.2.3.3

* [CardDAV] roll back commons-io to 2.8.0 for API levels <26 (fixes contacts sync problem on Android <8)
* [CalDAV] EventValidator: fix problem where COUNT=-1 was mistakenly added when an invalid RRULE was repaired
* [CalDAV] EventValidator: always set UNTIL of repaired RRULEs in UTC (may fix missed occurrences)
* [CalDAV] generate random filename if UID can't be used as file name (fixes rare problem when .ics files are imported from Web site and then synced)

Version 4.2.3.2

- fix "java.lang.NoSuchMethodError: No static method ofInstant" [bitfireAT#128]

Version bump to 4.2.3.1

Version 4.2.3.1-rc.1

* CalDAV: refactor and improve event validation and repairing (especially with recurring events)
* WebDAV: connections now have a delete symbol, so that people know that they would delete the connection
* minor bug fixes and improvements

Version 4.2.2

- improve compatibility with jtxBoard
- minor improvements and bugfixes

Version 4.2.1

- [CalDAV] don't crash on RDATEs with PERIOD
- [CalDAV/CardDAV/WebDAV] improved service compatibility
- minor bug fixes and improvements
- APKs are now automatically generated and published in Github releases

Version 4.2.0.3

* CalDAV: show exceptions of unknown recurring events (instead of ignoring them)
* jtx Board: propagate server-side read-only flag

Version 4.2.0.2

Ignore invalid contact photos like in previous versions; take first working contact photo

Version 4.2.0.1

Hotfix: make sure contact photos are JPEG (only affects Samsung Android 12 devices)