- Fixed NullPtrExceptions when setting offline UUID after a name change

Changed the way premium players are stored, now can support auto name change (BUNGEE ONLY). If a premium player changes their username, it will set the same UUID as the their old username.
- Added config option to disable or enable ^
- Added hook for BungeeCord version for AuthMeBungee to prevent players from /premium before logging in.
- Added support for 1.18 for Bukkit version
- Premium players are now stored by their Online UUID. It will automatically rename all current existing premium players data file to their online uuid string.

- Added a configuration file to manage your settings and messages

- Added support for AuthMe auto-login hook (you will need to enable 'hooks.bungeecord' under AuthMe (not AuthMeBungee) config for it to work)

- Added config option to always try to premium login if username is a registered player name (This will not allow players to enter if they are using a cracked account under a premium username, since they are not authenticated under Mojang servers)

- Added config option to debug

Users who joined will not be registered as premium until they do the /premium command. They will be kicked and they have to rejoin in 1 minute for the plugin to register them as premium. If they can't join during that 1 minute and keep getting NullPointerExceptions when they try to join, then it means that they are not premium. If they successfully join, then they will be registered as premium.

Also added /unpremium command if they choose to unregister their account as not premium. It will kick them and revert them back to cracked.

Do note that BungeeCord is the more supported version, if you have BungeeCord enabled then the Bukkit/Spigot version will not be used if you have it on the Bukkit servers.

For developers: If you want to register your user as premium, a plugin message channel will be sent whenever a user joins as a premium account. UUID of premium users will still be their Offline UUID instead of their Online UUID, do take note!