Run CI on different python versions

.github/workflows/main.yml

@@ -6,31 +6,30 @@ jobs:
 
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ["3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
+      - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8.5
+          python-version: ${{ matrix.python }}
 
       - name: Install Poetry
-        uses: snok/[email protected]
+        uses: snok/install-poetry@v1
+        with:
+          virtualenvs-in-project: false
+          virtualenvs-path: ~/.virtualenvs
 
-      - name: Cache Poetry virtualenv
-        uses: actions/cache@v1
-        id: cache
+      - name: Load cached venv
+        id: cached-poetry-dependencies
+        uses: actions/cache@v2
         with:
           path: ~/.virtualenvs
-          key: poetry-${{ hashFiles('**/poetry.lock') }}
-          restore-keys: |
-            poetry-${{ hashFiles('**/poetry.lock') }}
-
-      - name: Set Poetry config
-        run: |
-          poetry config virtualenvs.in-project false
-          poetry config virtualenvs.path ~/.virtualenvs
+          key: venv-${{ runner.os }}-${{ hashFiles('**/poetry.lock') }}
 
       - name: Install Dependencies
         run: make install-dev