avoid exponential explosion of test configurations

Author: svlandeg

.github/workflows/test.yml

@@ -26,16 +26,29 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        python-version:
-          - "3.8"
-          - "3.9"
-          - "3.10"
-          - "3.11"
-          - "3.12"
-          - "3.13"
+        python-version: [ "3.13" ]
         pydantic-version:
           - pydantic-v1
           - pydantic-v2
+        include:
+          - 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
+          - os: windows-latest
+            python-version: "3.12"
+            pydantic-version: pydantic-v1
+          - os: ubuntu-latest
+            python-version: "3.12"
+            pydantic-version: pydantic-v2
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps: