Changes:

• Fixed some minor issues with the ProtocolVersion enum class.
• Catch sql exceptions when trying to clean up database.
• Reset online status in database of offline players when cleaning database.
• Allow searching permission through all groups through the permsgui.
• Had to drop support for the old ticket system to support the new ticket system so that's what I've done.
• Added 1.21.4 support.
• Bumped MariaDB client to 3.5.1.

You can find the new ticket system here on GitHub.
NOTE: All old ticket accounts won't work anymore with the new ticket system. Your players will have to create a new account! Existing tickets won't be touched by this change!