Changes:

• Added multiplier for drop chance (WorldGuard and permission), due to this I've had to change the permission for the drop amount multiplier. Check the wiki for the new permissions!
• Added Folia support for the MobCoin Spinner. (Please test this carefully before using it. I've done some testing myself on Paper and Folia but just to be sure).
• Fixed NPE by checking it item has itemmeta before accessing the itemmeta.
• Updated a few libraries.
• Cleaned up some code.