remove problematic python versions for macOS tests

Author: petercorke

.github/workflows/main.yml

@@ -19,10 +19,19 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        os: [windows-latest, ubuntu-latest, macos-12]
+        os: [windows-latest, ubuntu-latest, macos-13]
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-
+        exclude:
+          - os: macos-13
+            version: "3.7"
+          - os: macos-13
+            version: "3.8"
+          - os: macos-13
+            version: "3.9"
+          - os: macos-13
+            version: "3.10"
     steps:
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5