Update setuptools to 43.0.0

[pyup-bot]

This PR updates setuptools from 42.0.2 to 43.0.0.

Changelog

43.0.0

-------

* 1634: Include ``pyproject.toml`` in source distribution by default. Projects relying on the previous behavior where ``pyproject.toml`` was excluded by default should stop relying on that behavior or add ``exclude pyproject.toml`` to their MANIFEST.in file.
* 1927: Setuptools once again declares 'setuptools' in the ``build-system.requires`` and adds PEP 517 build support by declaring itself as the ``build-backend``. It additionally specifies ``build-system.backend-path`` to rely on itself for those builders that support it.

Links

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

[codecov]

Codecov Report

Merging #249 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #249   +/-   ##
========================================
  Coverage    73.45%   73.45%           
========================================
  Files           70       70           
  Lines         2788     2788           
========================================
  Hits          2048     2048           
  Misses         740      740

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