try to add python-dotenv to prevent fails

Author: tamirse

.github/workflows/unit_tests.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install pytest pytest-cov pytest-responses responses
+          python -m pip install pytest pytest-cov pytest-responses responses python-dotenv
 
       - name: Test with pytest and coverage
         run: |