add pypi deploy workflow

.github/workflows/pypi_deploy.yml

@@ -0,0 +1,27 @@
+name: Deploy 🐍 pkg PROPOSAL
+
+on:
+  page_build:
+  release:
+    types:
+      - created
+
+jobs:
+
+    build-n-publish:
+      name: Build and publish Python 🐍 distributions 📦 to PyPI
+      runs-on: ubuntu-latest
+      steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - name: Install build
+        run: python -m pip install build
+      - name: Build source tarball
+        run: python -m build -s
+      - name: Publish distribution 📦 to PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}