[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci[bot]]

updates:

• github.com/PyCQA/isort: 5.7.0 → 5.8.0
• github.com/pre-commit/mirrors-yapf: v0.30.0 → v0.31.0
• https://gitlab.com/pycqa/flake8.git → https://github.com/PyCQA/flake8
• github.com/PyCQA/flake8: 3.8.4 → 3.9.1

[codecov[bot]]

Codecov Report

Merging #168 (030da6d) into master (02c064c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #168   +/-   ##
=======================================
  Coverage   84.60%   84.60%           
=======================================
  Files          66       66           
  Lines        1397     1397           
=======================================
  Hits         1182     1182           
  Misses        215      215           

Flag	Coverage Δ
unittests	84.60% <ø> (ø)

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