Bump pyflakes from 1.6.0 to 2.0.0

[dependabot-preview]

Bumps pyflakes from 1.6.0 to 2.0.0.

Changelog

Sourced from pyflakes's changelog.

2.0.0 (2018-05-20)

• Drop support for EOL Python <2.7 and 3.2-3.3
• Check for unused exception binding in except: block
• Handle string literal type annotations
• Ignore redefinitions of _, unless originally defined by import
• Support __class__ without self in Python 3
• Issue an error for raise NotImplemented(...)

Commits

• efddb93 Increment version to 2.0.0
• c2742b6 Update versions (#303)
• a13dbe6 Drop support for EOL Python <2.7 and 3.2-3.3 (#322)
• a440c20 skip Emacs/vim backup files (#331)
• af45b41 Warn on raise NotImplemented(...)
• 7a34cfd Fix typo (#327)
• b75144b Work around Travis CI error on Python "nightly" (#326)
• 8e9d44c Support __class__ without self in Python 3 (#325)
• 8a1feac Ignore underscore redefinition (#73)
• 8aece72 Handle string literal annotations (#313)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #11 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #11   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines          52     52           
=====================================
  Hits           52     52

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[dependabot-preview]

Superseded by #20.