[+] Added fixes for 1.21
[+] Added support for latest ItemsAdder versions
[+] NEW permission option for a layer. If the player does not have the permission, the block will regenerate as the same layer without any drops
[+] Fixes to consecutive ItemsAdder block layers in a resource
[+] Fixed occasional exceptions being thrown as a result of asynchronous jobs, improvements to regeneration stability
[+] Custom durability impact property has been changed to units from percentage