Update whitenoise to 4.1.4

[pyup-bot]

This PR updates whitenoise from 4.1 to 4.1.4.

Changelog

4.1.4

------

* Make tests more deterministic and easier to run outside of ``tox``.
* Fix Fedora packaging `issue <https://github.com/evansd/whitenoise/issues/225>`_.
* Use `Black <https://github.com/psf/black>`_ to format all code.

4.1.3

------

* Fix handling of zero-valued mtimes which can occur when running on some
filesystems (thanks `twosigmajab <https://github.com/twosigmajab>`_ for
reporting).
* Fix potential path traversal attack while running in autorefresh mode on
Windows (thanks `phith0n <https://github.com/phith0n>`_ for reporting).
This is a good time to reiterate that autofresh mode is never intended for
production use.

4.1.2

------

* Add correct MIME type for WebAssembly, which is required for files to be
executed (thanks `mdboom <https://github.com/mdboom>`_ ).
* Stop accessing the FILE_CHARSET Django setting which was almost entirely
unused and is now deprecated (thanks `timgraham
<https://github.com/timgraham>`_).

4.1.1

------

* Fix `bug <https://github.com/evansd/whitenoise/issues/202>`_ in ETag
handling (thanks `edmorley <https://github.com/edmorley>`_).
* Documentation fixes (thanks `jamesbeith <https://github.com/jamesbeith>`_
and `mathieusteele <https://github.com/mathieusteele>`_).

Links

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