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

https://github.com/svenper/void-packages biber
https://github.com/void-linux/void-packages/pull/13965

New package: biber-2.13
plus a whole bunch of its perl dependencies

A patch file from https://github.com/void-linux/void-packages/pull/13965.patch is attached