There is an updated pull request by amak79 against master on the void-packages repository

https://github.com/amak79/void-packages snapcast
https://github.com/void-linux/void-packages/pull/15614

New package: snapcast-0.18.0
~~This pull request is currently set to WIP because snapserver fails to build without Boost 1.70~~. Boost 1.72 is now available.

A patch file from https://github.com/void-linux/void-packages/pull/15614.patch is attached