BUG: Misc bug fixes for 3.1.1 release - #53

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, ammaraskar/gcc-problem-matcher@a141586609e2a558729b99a8c574c048f7f56204. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/