Update cycler to 0.11.0

[pyup-bot]

This PR updates cycler from 0.10.0 to 0.11.0.

Changelog

0.11.0

This is the first Cycler feature release in some years. New features include:

* Added `Cycler.by_key`, which produces values by key (26)
* Added `Cycler.__contains__`, which adds support for `in` checks (34)
* Wheels now includes the LICENSE file (48)
* The sdist now includes the LICENSE (58) and tests (32)
* Cycler no longer supports Python 2. Supported versions of Python are 3.6 and above.

Links

• PyPI: https://pypi.org/project/cycler
• Changelog: https://pyup.io/changelogs/cycler/
• Repo: https://github.com/matplotlib/cycler