The config was slightly changed, you can either delete it, or add the "packet-spoof" option for the new check manually

This update took me forever, and I'm still not very happy with how it turned out. I spent hours and hours trying to write an accurate way to detect when a player is on the ground, and while my new method seems to be much better than the one before, there are still some problems, especially when players are lagging.

Changelog v0.8.0:
- added a packet spoof check which can for example detect some nofall hacks
- spent an eternity trying to figure out how to accurately calculate if a player is onground, the method I came up with isn't perfect but seems to work alright
- fixed some other problems in the movement checks and generally improved them (because of the more accurate onground check)