Log Message:
py-jupyter_core: updated to 4.5.0

4.5.0
- jupyter --version now tries to show the version number of various other
  installed Jupyter packages, not just jupyter_core.
  This will hopefully make it clearer that there are various packages with
  their own version numbers.
- Allow a :envvar:JUPYTER_CONFIG_PATH environment variable to specify a
  search path of additional locations for config.
- jupyter subcommand no longer modifies the :envvar:PATH environment
  variable when it runs jupyter-subcommand.
- Jupyter's 'runtime' directory no longer uses XDG_RUNTIME_DIR.
  While it has some attractive properties, it has led to
  various problems; see the pull request for details.
- Fix JupyterApp to respect the raise_config_file_errors traitlet.
- Various improvements to the bash completion scripts in this repository
- The setup.py script now always uses setuptools, like most other Jupyter
  projects.
- The LICENSE file is included in wheels.