There is a new pull request by Piraty against master on the void-packages repository

https://github.com/Piraty/void-packages mat2-0.13.0
https://github.com/void-linux/void-packages/pull/39625

mat2: update to 0.13.0.
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/39625.patch is attached