Bump flake8-isort from 2.8.0 to 3.0.0

Created by: dependabot-preview[bot]

⚠️ Dependabot is rebasing this PR ⚠️

If you make any changes to it yourself then they will take precedence over the rebase.

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Bumps flake8-isort from 2.8.0 to 3.0.0.

Changelog

Sourced from flake8-isort's changelog.

3.0.0 (2020-04-15)

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

2.9.1 (2020-03-28)

• Fix flake8 warning. [sobolevn]

2.9.0 (2020-03-16)

• Add python3.8 suport. [sobolevn]

Commits

• a23f39c Preparing release 3.0.0
• 66c3a12 Add CHANGES
• 603c4c5 Merge pull request #79 from jnns/noconf
• 467b3df Add test for each config file
• a2d601d Refactor tests: split method for writing Python and config file
• c19651e Back to development: 2.9.2
• cd0d372 Preparing release 2.9.1
• 1e7f7f2 Add changelog entry
• 9e2dce5 Merge pull request #85 from sobolevn/patch-1
• 18a5ef6 Update run_tests.py
• Additional commits viewable in compare view

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