There is an updated pull request by paper42 against master on the void-packages repository

https://github.com/paper42/void-packages streamlink4
https://github.com/void-linux/void-packages/pull/36943

streamlink: update to 4.0.1.
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/36943.patch is attached