Update setuptools to 46.0.0

[pyup-bot]

This PR updates setuptools from 45.1.0 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.

45.3.0

-------

* 1557: Deprecated eggsecutable scripts and updated docs.
* 1904: Update msvc.py to use CPython 3.8.0 mechanism to find msvc 14+

45.2.0

-------

* 1905: Fixed defect in _imp, introduced in 41.6.0 when the 'tests' directory is not present.
* 1941: Improve editable installs with PEP 518 build isolation:

* The ``--user`` option is now always available. A warning is issued if the user site directory is not available.
* The error shown when the install directory is not in ``PYTHONPATH`` has been turned into a warning.
* 1981: Setuptools now declares its ``tests`` and ``docs`` dependencies in metadata (extras).
* 1985: Add support for installing scripts in environments where bdist_wininst is missing (i.e. Python 3.9).
* 1968: Add flake8-2020 to check for misuse of sys.version or sys.version_info.

Links

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

[coveralls]

Pull Request Test Coverage Report for Build 949

• 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 100.0%

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Totals
Change from base Build 934:	0.0%
Covered Lines:	139
Relevant Lines:	139

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #206