This update is just a major internal recode with more efficient and cleaner systems,
upgrading from v2.x.x is not a problem. There are more changes than listed but this is mostly what is changed.
Updated metrics/bStats.
Recoded a decent chunk of the plugin using new internals and packages.
Improved the VersionHelper, RegistrationHelper, HeadHelper and Common utils by them being static among other things.
Added an InventoryManager which contains open inventories and other things used for the Hive GUI.
Improved the instance creation of the plugin.
Added missing website and description in the plugin yml.
Added a new ConfigManager which is used for all config calls and caches the result until a reload or server restart, benchmarking has proven to be around 25x faster than using normal Spigot config calls.