There is an updated pull request by Johnnynator against master on the void-packages repository

https://github.com/Johnnynator/void-packages scummvm
https://github.com/void-linux/void-packages/pull/15196

[WIP] scummvm: update to 2.1.0.
2.1.0 is not yet officially released, but already tagged, 

A patch file from https://github.com/void-linux/void-packages/pull/15196.patch is attached