Test matrix including different os's

Author: svlandeg

.github/workflows/test.yml

@@ -26,16 +26,30 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version:
-          - "3.7"
-          - "3.8"
-          - "3.9"
-          - "3.10"
-          - "3.11"
-          - "3.12"
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+        python-version: [ "3.12" ]
         pydantic-version:
           - pydantic-v1
           - pydantic-v2
+        include:
+          - os: ubuntu-22.04
+            python-version: "3.7"
+            pydantic-version: pydantic-v1
+          - os: ubuntu-22.04
+            python-version: "3.7"
+            pydantic-version: pydantic-v2
+          - os: macos-latest
+            python-version: "3.8"
+            pydantic-version: pydantic-v1
+          - os: windows-latest
+            python-version: "3.9"
+            pydantic-version: pydantic-v2
+          - os: ubuntu-latest
+            python-version: "3.10"
+            pydantic-version: pydantic-v1
+          - os: macos-latest
+            python-version: "3.11"
+            pydantic-version: pydantic-v2
       fail-fast: false
     steps:
       - uses: actions/checkout@v4