Iron Chests: Restocked Barrel Fix

This Data Pack fixes the issue of the Iron, Gold, Diamond, Copper, Obsidian and Netherite barrels from the mod Iron Chests: Restocked not having the mineable/pickaxe tag. This would cause the barrels to have absurdly long mining times on top of not dropping after being mined.

With the mineable/pickaxe tag the barrels act the same as the chest equivalents from the mod, breaking and dropping after being mined using a pickaxe.