There's a merged pull request on the void-packages repository

mcomix: fix python-pillow-6.0.0 compatibility
https://github.com/void-linux/void-packages/pull/13148
Description: Fixes the incompatibility issue between MComix and Python-Pillow-6.0.0 described in issue #13143 using patches found at https://github.com/mat813/freebsd-ports/tree/d9a5e385afb3dab755ebe5138b09cf7351f992d9/graphics/py-mcomix/files