Add workflow to publish to PyPI

.github/workflows/publish-to-pypi.yml

@@ -0,0 +1,29 @@
+name: Publish to PyPI
+
+on: workflow_dispatch
+
+jobs:
+  build-n-publish:
+    name: Build and publish to PyPI
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.7
+
+    - name: Install dependencies
+      run: pip install wheel
+
+    - name: Build a binary wheel and a source tarball
+      run: |
+        python setup.py sdist bdist_wheel
+
+    - name: Publish distribution to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.pypi_password }}