Update dependency flake8-isort to v3

This MR contains the following updates:

Package	Type	Update	Change
flake8-isort	dev-dependencies	major	^2.8.0 -> ^3.0.0

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Release Notes

gforcada/flake8-isort

v3.0.0

Compare Source

• Let isort search the configuration, rather than flake8-isort try to find it. [jnns]

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Renovate configuration

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This MR has been generated by Renovate Bot.

added 4 commits

• 6580f144...303788ab - 3 commits from branch master
• ac5074da - Update dependency flake8-isort to v3

Compare with previous version

changed the description

marked the checklist item If you want to rebase/retry this MR, check this box as completed

added 13 commits

• ac5074da...ab5bfc66 - 12 commits from branch master
• a4a81b34 - Merge branch 'master' into 'renovate/flake8-isort-3.x'

Compare with previous version

mentioned in commit 8fd44777

merged