root/pypi: links for jupyterlab-plugin-playground

root/pypi jupyterlab_plugin_playground-0.4.0.tar.gz
root/pypi jupyterlab_plugin_playground-0.4.0-py3-none-any.whl
root/pypi jupyterlab_plugin_playground-0.3.0.tar.gz
root/pypi jupyterlab_plugin_playground-0.3.0-py3-none-any.whl
root/pypi jupyterlab_plugin_playground-0.2.0.tar.gz
root/pypi jupyterlab_plugin_playground-0.2.0-py3-none-any.whl