There is a new pull request by SevereOverfl0w against master on the void-packages repository

https://github.com/SevereOverfl0w/void-packages electrum336
https://github.com/void-linux/void-packages/pull/12621

electrum: update to 3.3.6 (security fixes)
Builds on for python3-aiorpcx update https://github.com/void-linux/void-packages/pull/12159

A patch file from https://github.com/void-linux/void-packages/pull/12621.patch is attached