Update setuptools to 46.0.0

[pyup-bot]

This PR updates setuptools from 45.3.0 to 46.0.0.

Changelog

46.0.0

-------

* 65: Once again as in 3.0, removed the Features feature.
* 1890: Fix vendored dependencies so importing ``setuptools.extern.some_module`` gives the same object as ``setuptools._vendor.some_module``. This makes Metadata picklable again.
* 1899: Test suite now fails on warnings.
* 2011: Fix broken link to distutils docs on package_data
* 1991: Include pkg_resources test data in sdist, so tests can be executed from it.

Links

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

[pyup-bot]

Closing this in favor of #79