NNCore [1.8.x Version]

Fixed the check for skript version and warning it gives.

Changelog (1.1): • Fixed the /fly command not actually toggling. • Added toggle for Join Message • Added toggle for Leave Message • Fixed the /gamemode command not working. • Added new message replies for commands (/heal, /feed, etc.) • Added Positive and Negative command prefixes. This makes it so you can have positive as green, and negative as red. Keep both the same if you wish to not use this feature. • Added a skript version checker, so if your version is outdated the plugin wont work. • Added a NNCore Version Checker, so if you have an old version it will tell you. • Other misc bug fixes.