Changes:
1.20.3
* Fixed multiple parallelism bugs
* 8-bit mode now has dithering
1.20.2
* Fixed a crash on startup with re-release Quake data
* Fixed crash with small stack sized on Unix (e.g. musl libc)
1.20.1
* Fix a bug that could cause random lockups with 1.20.0
* Fix screenshot crash
* Fix corruption if new vkquake.pak is missing or old one is still in place
1.20.0
* Parallelized renderer for significantly higher performance
* Parallelized texture mip generation for faster load times
* SIMD code optimizations
* "8-bit" color mode emulation
* Scaling is now less blurry
* Mods menu
* Completely replaced memory management (no more -heapsize)
OK thfr@ (maintainer)