This update of AntiNetherRoof
* Removes old-method and replaces it with a config option called 'freeze-on-entry', this is disabled by default. If enabled, it simply freezes the player if they enter the roof
* Fixed teleport-down from glitching and being stuck in an infinite loop
* Player can no longer drop items on the roof
* 1.20 support
* Removed 1.12 and lower support, there should no longer be a legacy API message in console