Test poetry workflow

Author: kartikbehl99

.github/workflows/python-app.yml

@@ -20,11 +20,11 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: 3.8
+    - uses: Gr1N/setup-poetry@v3
+    - run: poetry --version
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        poetry install
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names