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

https://github.com/RunningDroid/void-packages update_urlwatch
https://github.com/void-linux/void-packages/pull/23087

urlwatch: update to 2.21
It works fine as-is, but at least one feature is broken because it tries to import a python module that isn't packaged. I don't use that feature (beautify) but I'll look into packaging the missing modules.

A patch file from https://github.com/void-linux/void-packages/pull/23087.patch is attached