Fix poetry install

Author: orangetin

.github/workflows/upload-to-pypi.yml

@@ -19,7 +19,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install poetry
-      run: make poetry-download
+      run: curl -sSL https://install.python-poetry.org | python3 -
 
     - name: Set up cache
       uses: actions/cache@v2.1.6