Workflow to publish releases to PyPI

Uses https://github.com/pypa/gh-action-pypi-publish

.github/workflows/release.yml based off of implementation at
https://github.com/lewisacidic/cookiecutter-rich-pyproject/blob/ec0e7bbbabac24ffc7087611b3ff009fd70366d3/%7B%7B%20cookiecutter.project_name%20%7D%7D/.github/workflows/release.yml

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: Release
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  release:
+    name: Deploy release to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v1
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.7
+      - name: Install dependencies
+        run: pip install wheel
+      - name: Build package
+        run: python setup.py sdist bdist_wheel
+      - name: Upload package
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: __token__
+          password: ${{ secrets.pypi_password }}