Update setuptools to 45.0.0

[pyup-bot]

This PR updates setuptools from 44.0.0 to 45.0.0.

Changelog

45.0.0

-------

* 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

[codecov]

Codecov Report

Merging #262 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #262   +/-   ##
========================================
  Coverage    73.06%   73.06%           
========================================
  Files           74       74           
  Lines         2840     2840           
========================================
  Hits          2075     2075           
  Misses         765      765

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