mindshaft 0.7.3 for 1.18.1

bugfix release.
fixed default keybindings (see report on #1)
fixed lang file (it uses json now)
possibly(?) fixed a renderer error that resulted in problems during some events like taking player damage. maybe. i really hope so, it's been bugging the shit out of me.
moved to require forge 1.18.1, because we need people off of 1.18.

this is probably ready to use. i'm still calling it pre-release because i really want to work on the caching strategy and some performance elements.