Update dependency jupyter_client to v7.0.2

This MR contains the following updates:

Package	Type	Update	Change
jupyter_client (source)	ironbank-pypi	patch	7.0.1 -> 7.0.2

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Release Notes

jupyter/jupyter_client

v7.0.2

Compare Source

(Full Changelog)

Bugs fixed

• Don't set event loop policy on Windows at import time #​686 (@​minrk)

Documentation improvements

• Improve migration guide #​685 (@​davidbrochart)

Contributors to this release

(GitHub contributors page for this release)

@​blink1073 | @​davidbrochart | @​dhirschfeld | @​jankatins | @​kevin-bates | @​minrk | @​takluyver | @​yuvipanda

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