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

https://github.com/renatoaguiar/void-packages rtl8812au-dkms
https://github.com/void-linux/void-packages/pull/13366

rtl8812au-dkms: update to 20190724
Fixes linux-5.2.x build

A patch file from https://github.com/void-linux/void-packages/pull/13366.patch is attached