Version 0.4.0 on PyPI includes 0.3.0

[jhgoebbert]

On PyPI the tar-file at https://files.pythonhosted.org/packages/30/92/f9582475d6b30542a7e1c99f07ac99d9b845c62ac4e7e2ecba2d4b7370ba/jupyterlab_plugin_playground-0.4.0.tar.gz includes the file jupyterlab_plugin_playground-0.4.0/jupyterlab_plugin_playground/labextension/package.json which starts with

{
  "name": "@jupyterlab/plugin-playground",
  "version": "0.3.0",
  "description": "A JupyterLab Plugin Playground.",
  [..]

So it is not 0.4.0 but 0.3.0

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