Added dev_requirements.txt

.github/workflows/tests.yml

@@ -21,6 +21,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install -r dev_requirements.txt
         pip install -r requirements.txt
    # - name: Lint with flake8
    #   run: |
@@ -31,6 +32,4 @@ jobs:
        # flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
-        pip install pytest
-        pip install pytest-mock
         python -m pytest tests/