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

https://github.com/Vaelatern/void-packages neomutt
https://github.com/void-linux/void-packages/pull/21092

neomutt: update to 20200417.
This does not work, 9 unit tests fail. Upstream tracking issue: https://github.com/neomutt/neomutt/issues/2273

A patch file from https://github.com/void-linux/void-packages/pull/21092.patch is attached