Add support for 1.21.3 + update to CyanLib 0.5.2
Add support for 1.21.2 + add missing null checks
Fix getRequiredXpLevelsToTp() not returning the correct value, as it was called with the position of the player to the
position of the player, which made the return value always 1 (basically the xp taken from the player when it teleported
to a home was always 1)