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

https://github.com/marmeladema/void-packages libjcat
https://github.com/void-linux/void-packages/pull/21533

New package: libjcat-0.1.2
This package is required to update `fwupd`

A patch file from https://github.com/void-linux/void-packages/pull/21533.patch is attached