No changes, should just work with 1.21, but this is just to make it official and make people see that I checked whether 1.21 InventoryView changes in spigot affect this, and so far I don't think it should.

Fixed: Wrong permission checks.

Fixed: All bugs if they exist.
Added: Support for enchantment matching.
Added: Reload and help commands.

Added: "StorageBlocker.Admin" permission to allow admins to not get blocked.
Added: Ops are now not blocked.
Added: Some null checks to prevent errors.