Build fails on ubuntu-xenial (cmake 3.5.1, https://github.com/mkoeppe/PySCIPOpt/actions/runs/3457453303/jobs/5770894994) Build succeeds on linuxmint-19 (cmake 3.10.2, https://github.com/mkoeppe/PySCIPOpt/actions/runs/3457453303/jobs/5770895677) So it would make sense to use `cmake_minimum_required(VERSION 3.10)`