Fix CI (#295)

* Add missing Python 3.10 conf

* Update pip

* Update build system section

* Update poetry installation

* Small enhancements

* Upgrade lock file (and thus dependencies)

Co-authored-by: Mick Vleeshouwer <mick@imick.nl>

.github/workflows/main.yaml

@@ -19,19 +19,18 @@ jobs:
 
     steps:
       - uses: "actions/checkout@v2"
-      - uses: "actions/setup-python@v2"
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: "actions/setup-python@v2"
         with:
           python-version: "${{ matrix.python-version }}"
 
-      - name: Install and set up Poetry
-        run: |
-          curl -o get-poetry.py https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py
-          python get-poetry.py -y
+      - name: Set up Poetry
+        uses: Gr1N/setup-poetry@v7
 
       - name: "Install tox"
         run: |
+          python -m pip install --upgrade pip
           python -m pip install --upgrade tox tox-gh-actions
+
       - name: "Run tox targets for ${{ matrix.python-version }}"
-        run: |
-          source $HOME/.poetry/env
-          python -m tox
+        run: python -m tox