minifb 0.8.3

Closes #25

Bump to 0.8.0

Bump to 0.7.1

Merge menu-api-rework -> master

Rewrote Menu API

Bump to 0.6.0 as API changed (get_size added)

Merge work from menu branch

MouseMode::Clamp now clamps to [(0,0) (w-1,h-1)]

Bump to version 0.3.0