CI: Python 3.9 and 3.13, checkout@v4

Made-with: Cursor

Author: GaetanoCarlucci

.github/workflows/ci.yml

@@ -14,11 +14,11 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.8", "3.9"]
+        python-version: ["3.9", "3.13"]
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4