ci: minimal platform targets

Author: JLBegin

.github/workflows/tests.yaml

@@ -14,8 +14,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, macos-13, macos-latest, windows-latest ]
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
+        os: [ubuntu-latest, macos-13, macos-latest, windows-latest]
+        python-version: ["3.9", "3.13"]
+
+        include:
+          - os: ubuntu-latest
+            python-version: "3.10"
+          - os: ubuntu-latest
+            python-version: "3.11"
+          - os: ubuntu-latest
+            python-version: "3.12"
 
     runs-on: ${{ matrix.os }}