Add auto publish to pypi when pushing a new tag.

.github/workflows/publish-release.yml

@@ -0,0 +1,26 @@
+name: Publish Tags on PyPi when GitHub creates a release
+on:
+  push:
+    tags:
+      - 'v**'
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+      fail-fast: false
+      python-version: 3.9
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install upload dependencies
+      run: |
+        python -m pip install --upgrade pip setuptools wheel twine
+    - name: Build and publish
+      env:
+        TWINE_USERNAME: __token__
+        TWINE_PASSWORD: ${{ secrets.pypi_password }}
+      run: |
+        python setup.py sdist bdist_wheel
+        twine upload dist/*