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

https://github.com/jcgruenhage/void-packages python3-matrix-nio-0.20.1_1
https://github.com/void-linux/void-packages/pull/40596

python3-matrix-nio: adopt, update to 0.20.1, update deps
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#### Testing the changes
- I tested the changes in this PR: **YES**

Talked about this with @non-Jedi, he's okay with me adopting his packages.

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A patch file from https://github.com/void-linux/void-packages/pull/40596.patch is attached