[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci[bot]]

updates:

• github.com/PyCQA/flake8: 4.0.1 → 5.0.2
• github.com/pre-commit/mirrors-mypy: v0.961 → v0.971

[codecov[bot]]

Codecov Report

Merging #81 (4b7ed62) into main (050ba5b) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #81   +/-   ##
=======================================
  Coverage   91.02%   91.02%           
=======================================
  Files           7        7           
  Lines         735      735           
=======================================
  Hits          669      669           
  Misses         66       66           

Flag	Coverage Δ
pytests	91.02% <ø> (ø)

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