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

https://github.com/Wychmire/void-packages protontricks
https://github.com/void-linux/void-packages/pull/16218

protontricks: update to 1.3.0.
[Travis build successful on my fork](https://travis-ci.com/Wychmire/void-packages/builds/135563681).

A patch file from https://github.com/void-linux/void-packages/pull/16218.patch is attached