Add gh action to release packages to pypi

Author: johngian

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: mozilla-django-oidc pypi release
+on:
+  push:
+    tags:
+      - "[0-9]+.[0-9]+.[0-9]+"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    name: Mozilla Django OIDC Release
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+      - name: Install dependencies
+        run: pip install tox tox-gh-actions
+      - name: Run tox
+        run: tox
+      - name: Publish a Python distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_PASSWORD }}