Fix CI

[Laerte]

• Bump black version.
• Run black on needed files.

[codecov]

Codecov Report

Merging #12 (eb32acb) into main (718848e) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #12   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          352       352           
=========================================
  Hits           352       352           

Impacted Files	Coverage Δ
xtractmime/_patterns.py	100.00% <ø> (ø)

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[Gallaecio]

Thanks!