chore: add tests to github workflow (#2)

.github/workflows/tests.yml

@@ -0,0 +1,28 @@
+name: Python tests
+
+on: [pull_request]
+
+jobs:
+  python_tests:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10"]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e .
+      - name: Test with pytest
+        run: |
+          pytest