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

https://github.com/shak-mar/void-packages update-python3-PGPy-to-0.5.4
https://github.com/void-linux/void-packages/pull/37895

python3-PGPy: update to 0.5.4
The previous version of python3-PGPy (0.5.3) is not compatible with python 3.10 because of the `collections.MutableMapping` deprecation.  You can reproduce the issue by installing `python3-PGPy`, then running `python3` and within that, `import pgpy`.

#### Testing the changes
- I tested the changes in this PR: **briefly**

A patch file from https://github.com/void-linux/void-packages/pull/37895.patch is attached