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

https://github.com/ahesford/void-packages goimapnotify
https://github.com/void-linux/void-packages/pull/18502

New package: goimapnotify-2.0
goimapnotify is a program to establish IDLE connections to at least one mailbox on an IMAP server and execute commands when message notifications are received.

A patch file from https://github.com/void-linux/void-packages/pull/18502.patch is attached