Update runners (#55)

Author: ErikSchierboom

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     name: Run tests
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2022, macos-13]
+        os: [ubuntu-24.04, windows-2022, macos-14]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout code