Add xeger to tox.ini so that tox can run properly

.github/workflows/test.yml

@@ -0,0 +1,25 @@
+name: Python package
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        python-version: ["3.6", "3.8", "3.10", "3.12"]
+        platform: [ubuntu-20.04, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v3
+      - 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
+          python -m pip install 'tox<4' tox-gh-actions
+      - name: Test with tox
+        run: tox

.gitignore

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

tox.ini

@@ -1,2 +1,21 @@
+[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  
+
+[gh-actions]
+python =
+  3.6: py36
+  3.7: py37
+  3.8: py38
+  3.9: py39
+  3.10: py310
+  3.11: py311
+  3.12: py312