[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/psf/black: 21.7b0 → 21.8b0

[codecov-commenter]

Codecov Report

Merging #29 (24a0395) into main (9226a12) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #29   +/-   ##
=======================================
  Coverage   88.82%   88.82%           
=======================================
  Files          10       10           
  Lines         859      859           
=======================================
  Hits          763      763           
  Misses         96       96           

Flag	Coverage Δ
pytests	88.82% <ø> (ø)

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