Log Message:
py-jupyter_client: updated to 5.3.1

5.3.1

- Fix bug with control channel socket introduced in 5.3.0

5.3.0

New Features:
- Multiprocessing and Threading support
- Setup package long_description

Changes:
- Control channel now in the public API
- Closing Jupyter Client is now faster
- Pip support improvements

Breaking changes:
- Dropped support for Python 3.3 and 3.4 (upstream packages dropped support already)