Update ipykernel to 5.1.1

[pyup-bot]

This PR updates ipykernel from 5.1.0 to 5.1.1.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

- PyPI: https://pypi.org/project/ipykernel - Homepage: https://ipython.org

[coveralls]

Pull Request Test Coverage Report for Build 750

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 54.852%

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Totals
Change from base Build 742:	0.01%
Covered Lines:	4839
Relevant Lines:	8822

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💛 - Coveralls