ci: add publish to pypi workflow

.github/workflows/publish.yaml

@@ -0,0 +1,37 @@
+# This is a GitHub workflow defining a set of jobs with a set of steps.
+# ref: https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions
+#
+# Publish to PyPI on push of version like tags
+#
+name: Publish
+
+on:
+  push:
+    tags: v?[0-9]+.[0-9]+.[0-9]+*
+
+jobs:
+  publish-to-pypi:
+    name: Publish to PyPI
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install build package
+        run: |
+          pip install --upgrade pip
+          pip install build
+          pip freeze
+
+      - name: Build release
+        run: |
+          python -m build --sdist --wheel .
+          ls -alh dist
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@v1.4.1
+        with:
+          user: __token__
+          password: ${{ secrets.pypi_password }}