feat: poetry migration

Author: xmatoha

.github/workflows/python-package.yml

@@ -22,16 +22,26 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
-        
+    - name: Install Poetry
+      uses: snok/install-poetry@v1
+      with:
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+          installer-parallel: true      
+    - name: Load cached venv
+      id: cached-poetry-dependencies
+      uses: actions/cache@v3
+      with:
+           path: .venv
+           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install pytest pytest-cov poetry
-        poetry install
+      if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+      run: poetry install --no-interaction --no-root      
 
     - name: Test with pytest
       run: |
-        python3 -m pytest --cov=fastapi_featureflags -v tests/ --disable-warnings
+        source .venv/bin/activate
+        pytest --cov=fastapi_featureflags -v tests/ --disable-warnings
         
     - name: CodeCov
       run: bash <(curl -s https://codecov.io/bash)