-Removed numerical IDs (This will NOT affect 1.13 and 1.14 users. What this means: If you want to set a diamond for required item you need to use the material name, DIAMOND, instead of 264. You can still use DataValues.)
-Added CustomModelData property in both main item and required items. -Added Tipped Arrows compatibility. -Fixed bug getting item attributes in 1.14.
-Removed unused "Potion" NBT Tag.