- added more nerfs to config
- you can disable Portable Beacon in specific worlds
- you can disable Portable Beacon when it is not on player's hotbar
- you can set an experience cost that will deduct experience when in use (see `/pb inspect` for more info)
- added config to disable vanilla anvil level limit (Too Expensive! when cost > 39 levels)
- updated Spigot API to 1.16.4 (should be backwards-compatible)