Add pipeline to release sdist on pypi

.github/workflows/publish.yml

@@ -0,0 +1,32 @@
+name: Publish
+
+on:
+  release:
+    types:
+      # Note: editing the prerelease then marking as release does not trigger
+      # this pipeline
+      # - prereleased
+      - released
+  workflow_dispatch:
+
+jobs:
+  release-pypi-sdist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build sdist
+        run: |
+          python3 setup.py sdist
+      - name: List available sdist
+        run: |
+          ls ${{ github.workspace }}/dist
+      - name: Publish to PyPI
+        # if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          #password: ${{ secrets.PYPI_TEST_API_TOKEN }}
+          #repository_url: https://test.pypi.org/legacy/
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages-dir: ${{ github.workspace }}/dist
+          verbose: true