Add github action for running tests

.github/workflows/test.yaml

@@ -0,0 +1,28 @@
+name: Run tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e ".[test]"
+      - name: Run tests
+        run: |
+          pytest
+      - name: Validate minimum required version
+        run: |
+          vermin pdf417gen

.vermin

@@ -0,0 +1,4 @@
+[vermin]
+only_show_violations = yes
+show_tips = no
+targets = 3.6-

pyproject.toml

@@ -34,10 +34,13 @@ packages = [
 [project.optional-dependencies]
 dev = [
     "build",
+    "twine",
+]
+
+test = [
     "mock",
     "pytest",
     "pytest-cov",
-    "twine",
     "vermin",
 ]