Scheduled monthly dependency update for July

[pyup-bot]

Update isort from 5.8.0 to 5.9.1.

Changelog

5.9.1

- Fixed 1758: projects with many files and skip_ignore set can lead to a command-line overload.

5.9.0

- Improved CLI startup time.
- Implemented 1697: Provisional support for PEP 582: skip `__pypackages__` directories by default.
- Implemented 1705: More intuitive handling of isort:skip_file comments on streams.
- Implemented 1737: Support for using action comments to avoid adding imports to individual files.
- Implemented 1750: Ability to customize output format lines.
- Implemented 1732: Support for custom sort functions.
- Implemented 1722: Improved behavior for running isort in atomic mode over Cython source files.
- Fixed (https://github.com/PyCQA/isort/pull/1695): added imports being added to doc string in some cases.
- Fixed (https://github.com/PyCQA/isort/pull/1714): in rare cases line continuation combined with tabs can output invalid code.
- Fixed (https://github.com/PyCQA/isort/pull/1726): isort ignores reverse_sort when force_sort_within_sections is true.
- Fixed 1741: comments in hanging indent modes can lead to invalid code.
- Fixed 1744: repeat noqa comments dropped when * import and non * imports exist from the same package.
- Fixed 1721: repeat noqa comments on separate from lines with force-single-line set, sometimes get dropped.

Goal Zero (Tickets related to aspirational goal of achieving 0 regressions for remaining 5.0.0 lifespan):
- Implemented 1394: 100% branch coverage (in addition to line coverage) enforced.
- Implemented 1751: Strict typing enforcement (turned on mypy strict mode).

Links

• PyPI: https://pypi.org/project/isort
• Changelog: https://pyup.io/changelogs/isort/
• Repo: https://pycqa.github.io/isort/