Update xkb_keymap reference (#233)
Update xkb_keymap reference (#233)

The xkbcommon_sys crate seems to have been updated today, and now the minifb project won't compile. 

We can fix this by updating XKB_KEYMAP_FORMAT_TEXT_v1 to XKB_KEYMAP_FORMAT_TEXT_V1.
emoon/rust_minifb,emoon/rust_minifb,emoon/rust_minifb