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

https://github.com/joshuakraemer/void-packages imagemagick-update
https://github.com/void-linux/void-packages/pull/31986

ImageMagick: update to 7.1.0.2 (with soname bump)
- Remove unnecessary configure options
- Add support for graphviz, jbig, lqr and raqm

A patch file from https://github.com/void-linux/void-packages/pull/31986.patch is attached