Add Github actions

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: "Run tests"
+on:
+  push:
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install
+        run: pip install tox
+      - name: Run tox
+        run: tox