🎨 Comply with isort, mypy, flake8 and black

[Ousret]

Long overdue PR. This should push further the CI quality pipeline.

[codecov-commenter]

Codecov Report

Merging #81 (980d369) into master (d05e10c) will decrease coverage by 0.03%.
The diff coverage is 84.21%.

@@            Coverage Diff             @@
##           master      #81      +/-   ##
==========================================
- Coverage   84.71%   84.68%   -0.04%     
==========================================
  Files          11       11              
  Lines        1145     1149       +4     
==========================================
+ Hits          970      973       +3     
- Misses        175      176       +1     

Impacted Files	Coverage Δ
charset_normalizer/assets/__init__.py	100.00% <ø> (ø)
charset_normalizer/models.py	87.11% <62.06%> (ø)
charset_normalizer/cli/normalizer.py	64.83% <74.28%> (ø)
charset_normalizer/utils.py	77.40% <75.00%> (ø)
charset_normalizer/api.py	82.14% <84.00%> (+0.09%)	⬆️
charset_normalizer/legacy.py	86.66% <85.71%> (ø)
charset_normalizer/md.py	88.19% <95.83%> (ø)
charset_normalizer/cd.py	95.83% <96.77%> (-0.63%)	⬇️
charset_normalizer/__init__.py	100.00% <100.00%> (ø)
charset_normalizer/constant.py	100.00% <100.00%> (ø)
... and 1 more

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[Ousret]

will decrease coverage by 0.03%.

Can be dismissed...