Add GitHub Actions workflow for Python package testing

.github/workflows/test.yml

@@ -0,0 +1,36 @@
+name: Python package
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        platform: [ubuntu-20.04, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.6'
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.8'
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.12'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install tox
+      - name: Test with tox
+        run: python -m tox

.gitignore

@@ -138,3 +138,5 @@ venv/
 
 # VS Code
 .vscode
+
+.python-version

tox.ini

@@ -1,2 +1,11 @@
+[tox]
+envlist = py36, py37, py38, py39, py310, py311, py312
+requires = virtualenv < 20.22.0
+isolated_build = true
+
 [testenv]
-commands=python unit_test.py
+deps = 
+  xeger
+  colorful
+commands = python unit_test.py
+allowlist_externals = poetry