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

https://github.com/sgn/void-packages drop-qt4-qca
https://github.com/void-linux/void-packages/pull/24075

qca: drop package
All dependents have been moved to qca-qt5

A patch file from https://github.com/void-linux/void-packages/pull/24075.patch is attached