Update setuptools to 52.0.0

[pyup-bot]

This PR updates setuptools from 51.3.3 to 52.0.0.

Changelog

52.0.0

-------


Breaking Changes
^^^^^^^^^^^^^^^^
* 2537: Remove fallback support for fetch_build_eggs using easy_install. Now pip is required for setup_requires to succeed.
* 2544: Removed 'easy_install' top-level model (runpy entry point) and 'easy_install' console script.
* 2545: Removed support for eggsecutables.

Changes
^^^^^^^
* 2459: Tests now run in parallel via pytest-xdist, completing in about half the time. Special thanks to :user:`webknjaz` for hard work implementing test isolation. To run without parallelization, disable the plugin with ``tox -- -p no:xdist``.

Links

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

[coveralls]

Coverage remained the same at 86.233% when pulling 7513bbe on pyup-update-setuptools-51.3.3-to-52.0.0 into 2d84ca7 on master.

[pyup-bot]

Closing this in favor of #292