this update fixes and changes some things but overall its a very epic update

1. Nicknames no longer show up in first person from the POV of the nicked player.
2. Added a "prefix" option.
3. You can now change your nickname simply by nicking again, rather than un-nicking and re-nicking.
4. Added support for advancements, requires skript-advancements.
5. Added random nicking with /rnick <player> which generates a random username and applies it to the player.

if you notice any bugs, please let me know!