Run black and update setup.cfg for flake8 to ignore E701 and E704

[Tim-Thomas]

This re-formats everything to match current black configuration and allow flake8 to succeed.

[Tim-Thomas]

This seems to be a deliberate change to black: https://github.com/psf/black/pull/4066/files and the conflict with flake8 as well as the solution (tell flake8 to ignore e701 and e704) is documented here: psf/black#4173

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (4a09533) 93.73% compared to head (307f4fd) 93.72%.

Files	Patch %	Lines
faust/transport/consumer.py	50.00%	0 Missing and 2 partials ⚠️
faust/contrib/sentry.py	0.00%	1 Missing ⚠️
faust/livecheck/case.py	50.00%	0 Missing and 1 partial ⚠️
faust/sensors/base.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #609      +/-   ##
==========================================
- Coverage   93.73%   93.72%   -0.02%     
==========================================
  Files         102      102              
  Lines       11158    11122      -36     
  Branches     1536     1545       +9     
==========================================
- Hits        10459    10424      -35     
+ Misses        612      607       -5     
- Partials       87       91       +4     

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[wbarnha]

Thank you for this PR as well! LGTM!