_Black_
- Fix failure caused by `fmt: skip` and indentation (2281)
- Account for += assignment when deciding whether to split string (2312)
- Correct max string length calculation when there are string operators (2292)
- Fixed option usage when using the `--code` flag (2259)
- Do not call `uvloop.install()` when _Black_ is used as a library (2303)
- Added `--required-version` option to require a specific version to be running (2300)
- Fix incorrect custom breakpoint indices when string group contains fake f-strings
(2311)
- Fix regression where `R` prefixes would be lowercased for docstrings (2285)
- Fix handling of named escapes (`\N{...}`) when `--experimental-string-processing` is
used (2319)

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

- 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).

* Skip UnsupportedFeature's on the command line. Thanks therefromhere.

* Add RIPE ID. Thanks pishchalnikov.

* Avoid collision for ``date`` in ``datetime`` provider. Thanks mattshin.

* Fix ``left_digits`` ignored if ``min_value`` is given. Thanks OJFord.q

* Add ``iana_id``, IANA Registrar ID. Thanks pishchalnikov.

* Add tlds for ``th_TH`` internet provider. Thanks bact.

* Add ``aba()`` method to generate ABA routing numbers. Thanks mstellon.