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

https://github.com/ndowens/void-packages libxmlb
https://github.com/void-linux/void-packages/pull/15988

libxmlb-devel: update to 0.1.13


A patch file from https://github.com/void-linux/void-packages/pull/15988.patch is attached