editable install (#56)

.github/workflows/test_and_deploy.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install .[dev]
+          pip install -e .[dev]
           pip install pytest PyQt5 --upgrade
           pip install pytest-xvfb