Add publishing workflow

.github/workflows/publish.yml

@@ -0,0 +1,28 @@
+name: Publish Python distribution to PyPI
+
+on:
+  push:
+    branches:
+      - master
+      - workflow
+
+jobs:
+  publish:
+    name: publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.9
+      - name: Build package
+        run: |
+          python -m pip install -U pip build
+          python -m build
+      - name: Publish
+        uses: pypa/[email protected]
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}