Update and rename publish_to_pypi.py to publish_to_pypi.yml

Author: sachaw

.github/workflows/publish_to_pypi.py

@@ -0,0 +1,36 @@
+name: Publish PyPI
+
+on: workflow_dispatch
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - name: Install pypa/build
+        run: >-
+          python -m
+          pip install
+          build
+          --user
+      - name: Build a binary wheel and a source tarball
+        run: >-
+          python -m
+          build
+          --sdist
+          --wheel
+          --outdir dist/
+          .
+      - name: Publish to PyPI
+        if: startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          username: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}