Bump flake8 from 3.8.4 to 3.9.0

[dependabot-preview[bot]]

Bumps flake8 from 3.8.4 to 3.9.0.

Commits

• 434c108 Release 3.9.0
• 7c96c1e Merge branch 'pycodestyle_2_7_0' into 'master'
• 40aba49 upgrade pycodestyle to 2.7.0
• ac9c66e Add indent-size option
• fd71b86 Merge branch 'pyflakes_3_3' into 'master'
• 1eccf9a upgrade pyflakes to 2.3.x
• 6de8252 Merge branch 'crlf_stdin' into 'master'
• 0bf8d2a ensure crlf line endings of stdin are handled properly
• ff433b2 Merge branch 'fix_linters' into 'master'
• 14857c9 fix test which was not testing anything
• Additional commits viewable in compare view

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[codecov[bot]]

Codecov Report

Merging #702 (be532eb) into main (4e0e35f) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #702   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           38        38           
  Lines         2423      2423           
=========================================
  Hits          2423      2423           

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