[pre-commit.ci] pre-commit autoupdate

[pre-commit-ci[bot]]

updates:

• https://github.com/timothycrosley/isort → https://github.com/PyCQA/isort
• https://gitlab.com/pycqa/flake8 → https://github.com/PyCQA/flake8
• github.com/PyCQA/flake8: 3.9.2 → 5.0.4
• github.com/asottile/pyupgrade: v2.37.2 → v2.37.3

[codecov[bot]]

Codecov Report

Merging #139 (16bf6e7) into develop (9d6bef9) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #139   +/-   ##
========================================
  Coverage    98.02%   98.02%           
========================================
  Files            8        8           
  Lines          456      456           
  Branches        53       53           
========================================
  Hits           447      447           
  Misses           6        6           
  Partials         3        3           

Flag	Coverage Δ
unittests	97.80% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
meta/__init__.py	100.00% <100.00%> (ø)

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