Fix wheels not published to pypi on release

.github/workflows/tests.yml

@@ -242,7 +242,7 @@ jobs:
           name: dist
           path: dist/
       - name: Publish to PyPI
-        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/')
+        if: github.event_name == 'release' && github.event.action == 'published'
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           user: __token__