Update flake8-isort requirement from <4.2,>=4.0 to >=4.0,<4.3 in /requirements

[dependabot[bot]]

Updates the requirements on flake8-isort to permit the latest version.

Changelog

Sourced from flake8-isort's changelog.

4.2.0 (2022-08-04)

• Fix compatibility with flake8 version 5. [nhymxu]

4.1.2.post0 (2022-07-25)

• Release it as a wheel as well. [gforcada]

4.1.2 (2022-07-25)

• The package no longer depends on testfixtures.

4.1.1 (2021-10-14)

• Release py3 only wheels..

4.1.0 (2021-10-14)

• Support flake8 4.x [g-as]

• Switch from travis-ci to github actions. [g-as]

• Drop python 2.7 support and 3.5 as well [g-as]

4.0.0 (2020-08-11)

• Nothing changed yet.

4.0.0a0 (2020-08-07)

• support isort >= 5 [bnavigator, pkolbus]

3.0.1 (2020-07-08)

• Work around FailedToLoadPlugin exception by requiring isort 4.x. Likewise,

... (truncated)

Commits

• 0d458d9 Preparing release 4.2.0
• 9bf02d4 Update CHANGES
• a31c6e3 Merge pull request #116 from nhymxu/upgrade-flake8-v5
• 31cccb3 bump flake8 version on test matrix
• 3f3615a revert package version as-is
• 267a559 deps: support flake8 v5
• 12e26cb Back to development: 4.1.2.post1
• 162e6ab Preparing release 4.1.2.post0
• f07db91 Update CHANGES
• 1243d42 Back to development: 4.1.3
• Additional commits viewable in compare view

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