Update isort to 4.3.1

[pyup-bot]

There's a new version of isort available.
You are currently using 4.2.15. I have updated it to 4.3.1

These links might come in handy: PyPI | Changelog | Repo

Changelog

4.3.1

• Fixed setup.py errors
• Fixed issue 654: Trailing comma count error
• Fixed issue 651: Add imports option is broken
• Fixed issue 650: Wrong error message displayed

4.3.0

• Fixed 557: force_alphabetical_sort and force_sort_within_sections can now be utilized together without extra new lines
• Fix case-sensitive path existence check in Mac OS X
• Added --no-lines-before for more granular control over section output
• Fixed 493: Unwanted conversion to Windows line endings
• Implemented --version-number to retrieve just the version number without the isort logo
• Breaking changes
  • Python 2.7+ only (dropped 2.6) allowing various code simplifications and improvements.

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[codecov-io]

Codecov Report

Merging #95 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #95   +/-   ##
=======================================
  Coverage   79.71%   79.71%           
=======================================
  Files           8        8           
  Lines         853      853           
=======================================
  Hits          680      680           
  Misses        173      173

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[pyup-bot]

Closing this in favor of #97