[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/PyCQA/flake8: 3.9.0 → 3.9.1

[codecov]

Codecov Report

Merging #1388 (4754141) into master (3f19f8c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1388   +/-   ##
=======================================
  Coverage   99.67%   99.67%           
=======================================
  Files          33       33           
  Lines        3037     3037           
  Branches      327      327           
=======================================
  Hits         3027     3027           
  Misses          5        5           
  Partials        5        5           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3f19f8c...4754141. Read the comment docs.