Merge pull request #52 from daniperez/daniperez/fix/ci-macos-failure

Using a more recent python to avoid [1]

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python 3.x
       uses: actions/setup-python@v3
       with:
-        python-version: "3.7"
+        python-version: "3.9"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip build