nuwa/stage: links for swm-example-plugin

root/pypi swm_example_plugin-0.6.3.tar.gz
root/pypi swm_example_plugin-0.6.3-py3-none-any.whl
root/pypi swm_example_plugin-0.6.3.dev1.tar.gz
root/pypi swm_example_plugin-0.6.3.dev1-py3-none-any.whl
root/pypi swm_example_plugin-0.6.2.tar.gz
root/pypi swm_example_plugin-0.6.2-py3-none-any.whl
root/pypi swm_example_plugin-0.6.2.dev19.tar.gz
root/pypi swm_example_plugin-0.6.2.dev19-py3-none-any.whl