There is a new pull request by HadetTheUndying against master on the void-packages repository

https://github.com/HadetTheUndying/void-packages mesa-20.3.1
https://github.com/void-linux/void-packages/pull/27214

mesa: update to 20.3.1.
removed drm and surfaceless from platforms since they're determined automatically now.

A patch file from https://github.com/void-linux/void-packages/pull/27214.patch is attached