Update pytest-sugar to 0.9.7

[pyup-bot]

This PR updates pytest-sugar from 0.9.6 to 0.9.7.

Changelog

0.9.7

^^^^^^^^^^^^^^^^^^

- For long-running tests, display minutes and not only seconds (thanks last-partizan)
- Add support for Pytest’s ``--header`` option (thanks wiresv)

Links

• PyPI: https://pypi.org/project/pytest-sugar
• Changelog: https://pyup.io/changelogs/pytest-sugar/
• Homepage: https://pivotfinland.com/pytest-sugar/

[pyup-bot]

Closing this in favor of #281