Update chardet to 4.0.0

[pyup-bot]

This PR updates chardet from 3.0.4 to 4.0.0.

Changelog

4.0.0

Benchmarking chardet 4.0.0 on CPython 3.7.5 (default, Sep  8 2020, 12:19:42)
[Clang 11.0.3 (clang-1103.0.32.62)]
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Calls per second for each encoding:

Links

• PyPI: https://pypi.org/project/chardet
• Changelog: https://pyup.io/changelogs/chardet/
• Repo: https://github.com/chardet/chardet

[codecov-io]

Codecov Report

Merging #38 (99c246b) into master (4a4a665) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #38   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          116       116           
=========================================
  Hits           116       116           

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[pyup-bot]

Closing this in favor of #179