Update setuptools to 45.1.0

[pyup-bot]

This PR updates setuptools from 42.0.2 to 45.1.0.

Changelog

45.1.0

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* 1458: Add minimum sunset date and preamble to Python 2 warning.
* 1704: Set sys.argv[0] in setup script run by build_meta.__legacy__
* 1974: Add Python 3 Only Trove Classifier and remove universal wheel declaration for more complete transition from Python 2.

45.0.0

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* 1458: Drop support for Python 2. Setuptools now requires Python 3.5 or later. Install setuptools using pip >=9 or pin to Setuptools <45 to maintain 2.7 support.
* 1959: Fix for Python 4: replace unsafe six.PY3 with six.PY2

44.0.0

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* 1908: Drop support for Python 3.4.

43.0.0

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* 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 #171 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #171   +/-   ##
=======================================
  Coverage   65.56%   65.56%           
=======================================
  Files          16       16           
  Lines        1484     1484           
=======================================
  Hits          973      973           
  Misses        511      511

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[pyup-bot]

Closing this in favor of #190