ci: Test using all supported Python versions

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

.github/workflows/ci.yaml

@@ -4,7 +4,15 @@ on: [pull_request, push, workflow_dispatch]
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        os:
+          - ubuntu-20.04
+        python-version:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+    runs-on: ${{ matrix.os }}
 
     steps:
     - name: Fetch sources
@@ -15,14 +23,14 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: "3.8"
+        python-version: ${{ matrix.python-version }}
 
     - uses: actions/cache@v3
       with:
         path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}
+        key: ${{ runner.os }}-${{ matrix.python-version }}-pip-${{ hashFiles('pyproject.toml') }}
         restore-keys: |
-          ${{ runner.os }}-pip-
+          ${{ runner.os }}-${{ matrix.python-version }}-pip-
 
     - name: Install required Python packages
       run: |