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

https://github.com/mtboehlke/void-packages signify
https://github.com/void-linux/void-packages/pull/38590

signify: update to 31.
Add needed libmd makedepend and tar checkdepend,
use vsed instead of sed for the file patching,
and use sed instead of head to extract a nicer LICENSE file

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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/38590.patch is attached