0.2.1

Added

• pytest-plugin for Jupyter Server.
  • Allows one to write async/await syntax in tests functions.
  • Some particularly useful fixtures include:
    • serverapp: a default ServerApp instance that handles setup+teardown.
    • configurable_serverapp: a function that returns a ServerApp instance.
    • fetch: an awaitable function that tests makes requests to the server API
    • create_notebook: a function that writes a notebook to a given temporary file path.