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

https://github.com/abenson/void-packages aniso8601_8.1.0
https://github.com/void-linux/void-packages/pull/27076

python3-aniso8601: update to 8.1.0.


A patch file from https://github.com/void-linux/void-packages/pull/27076.patch is attached