ci(parallel): run parallel build against serial tests · MODFLOW-ORG/modflow6@3550fea

gcc@13 13.3.0 is already installed and up-to-date. To reinstall 13.3.0, run: brew reinstall gcc@13

rustup is outdated! To avoid broken installations, as soon as possible please run: brew upgrade Or, if you're OK with a less reliable fix: brew upgrade rustup

gcc@13 13.3.0 is already installed and up-to-date. To reinstall 13.3.0, run: brew reinstall gcc@13