Update setuptools to 45.0.0

[pyup-bot]

This PR updates setuptools from 44.0.0 to 45.0.0.

Changelog

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

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 894

• 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 886:	0.0%
Covered Lines:	139
Relevant Lines:	139

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💛 - Coveralls