Merge branch 'use-stricter-flake' into 'master'

Use image with stricter flake8

See merge request !16
2 jobs for 18-extract-depth-range in 1 minute and 36 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #6735
lint

00:00:29

passed #6734
pytest_and_coverage

00:01:36

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