Update flake8-builtins requirement from <1.6,>=1.5 to >=1.5,<2.3 in /requirements

[dependabot[bot]]

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

Changelog

Sourced from flake8-builtins's changelog.

2.2.0 (2023-11-03)

• Use tox and pre-commit to ease project maintenance. [gforcada]

2.2.0a0 (2023-11-01)

• Drop python 3.7 support. [gforcada]

• Test pre-release of python 3.12. [gforcada]

• Use pyproject.toml rather than setup.py. [gforcada]

• Switch from setuptools to hatchling. [gforcada]

• Add rule for import shadowing (A004). [felixvd]

• Switch to main branch. [gforcada]

2.1.0 (2022-12-23)

• Honor --builtins option from flake8 #73. [gforcada]

2.0.1 (2022-11-01)

• Add official support for python 3.10 and 3.11. [gforcada] [michael-k]

• Update options handling. [gforcada]

• Simplify testing. [gforcada]

2.0.0 (2022-10-08)

• Mark support for python 3.9. [lovetoburnswhen]

• Replace travis for GitHub. [cclauss]

• Fix CI badge. [sobolevn]

... (truncated)

Commits

• 9d724e1 Preparing release 2.2.0
• e2891bf Merge pull request #117 from gforcada/improve-tooling
• a2c9aef Update CHANGES
• 68a4e75 chore: add missing trove classifier
• 16d0bf7 chore: black
• be05b65 chore: isort
• 48b589a chore: pyupgrade
• 4f1a5fb feat: configure tools
• 821cd31 feat(gha): use tox environments
• c4b89aa feat: add tox configuration
• Additional commits viewable in compare view

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