add github tests

.github/workflows/tests.yaml

@@ -0,0 +1,65 @@
+name: Tests
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: Test suite with py310-ubuntu
+            python: "3.10"
+            os: ubuntu-latest
+            toxenv: py310
+          - name: Test suite with py311-ubuntu
+            python: "3.11"
+            os: ubuntu-latest
+            toxenv: py311
+          - name: Type check with mypy
+            python: "3.10"
+            os: ubuntu-latest
+            toxenv: type
+          - name: Formatting with black + isort
+            python: "3.10"
+            os: ubuntu-latest
+            toxenv: format
+          - name: Linting with flake8 + ruff
+            python: "3.10"
+            os: ubuntu-latest
+            toxenv: lint
+
+    name: ${{ matrix.name }}
+    env:
+      # Color Output
+      # Rich (pip)
+      FORCE_COLOR: 1
+      # Tox
+      PY_COLORS: 1
+      # MyPy
+      TERM: xterm-color
+      MYPY_FORCE_COLOR: 1
+      MYPY_FORCE_TERMINAL_WIDTH: 200
+      # Pytest
+      PYTEST_ADDOPTS: "--color=yes"
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+          check-latest: true
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install tox
+      - name: Setup tox environment
+        run: tox -e ${{ matrix.toxenv }} --notest
+
+      - name: Test
+        run: tox -e ${{ matrix.toxenv }} --skip-pkg-install