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

https://github.com/karl-nilsson/void-packages py-numpy-stl
https://github.com/void-linux/void-packages/pull/26885

python3-numpy-stl: update to 2.13.0.
minor update, fixed tests

A patch file from https://github.com/void-linux/void-packages/pull/26885.patch is attached