Add PyPI upload step to release workflow

Author: pangpang20

.github/workflows/release.yml

@@ -56,3 +56,12 @@ jobs:
         uses: softprops/action-gh-release@v1
         with:
           files: all_dist/*
+
+      - name: Upload to PyPI
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          pip install --upgrade twine
+          twine upload all_dist/*
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}