[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• https://github.com/ambv/black → https://github.com/psf/black
• https://gitlab.com/pycqa/flake8 → https://github.com/PyCQA/flake8
• github.com/PyCQA/flake8: 3.9.2 → 5.0.4

[codecov]

Codecov Report

Base: 95.55% // Head: 95.55% // No change to project coverage 👍

Coverage data is based on head (a8f1a59) compared to base (1002f48).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #187   +/-   ##
=======================================
  Coverage   95.55%   95.55%           
=======================================
  Files          36       36           
  Lines         405      405           
=======================================
  Hits          387      387           
  Misses         18       18           

Flag	Coverage Δ
unittests	95.55% <ø> (ø)

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