install the dependencies to run the tests

Author: fdiblen

.github/workflows/tests.yml

@@ -28,6 +28,10 @@ jobs:
       run: |
         which python
         python --version
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip setuptools
+        python -m pip install .[dev]
     - name: Run pytest
       run: |
         python -m pytest -v --durations=0