Update whitenoise to 4.1.1

[pyup-bot]

This PR updates whitenoise from 4.1 to 4.1.1.

Changelog

4.1.1

------

* Fix `bug <https://github.com/evansd/whitenoise/issues/202>`_ in ETag
handling (thanks `edmorley <https://github.com/edmorley>`_).
* Add .woff2 to the list of file extensions that don't require compression
(thanks `jamesbeith <https://github.com/jamesbeith>`_).

Links

• PyPI: https://pypi.org/project/whitenoise
• Changelog: https://pyup.io/changelogs/whitenoise/
• Homepage: http://whitenoise.evans.io

[coveralls]

Pull Request Test Coverage Report for Build 391

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 71.504%

---

Totals
Change from base Build 367:	0.0%
Covered Lines:	1488
Relevant Lines:	2081

---

💛 - Coveralls

[pyup-bot]

Closing this in favor of #99