Update more-itertools to 8.12.0

[pyup-bot]

This PR updates more-itertools from 8.8.0 to 8.12.0.

Changelog

8.12.0

------

* Bug fixes
 * Some documentation issues were fixed (thanks to Masynchin, spookylukey, astrojuanlu, and stephengmatthews)
 * Python 3.5 support was temporarily restored (thanks to mattbonnell)

8.11.0

------

* New functions
 * The :func:`before_and_after`, :func:`sliding_window`, and :func:`triplewise` recipes from the Python 3.10 docs were added
 * :func:`duplicates_everseen` and :func:`duplicates_justseen` (thanks to OrBin and DavidPratt512)
 * :func:`minmax` (thanks to Ricocotam, MSeifert04, and ruancomelli)
 * :func:`strictly_n` (thanks to hwalinga and NotWearingPants)
 * :func:`unique_in_window`

* Changes to existing functions
 * :func:`groupby_transform` had its type stub improved (thanks to mjk4 and ruancomelli)
 * :func:`is_sorted` now accepts a ``strict`` parameter (thanks to Dutcho and ruancomelli)
 * :func:`zip_broadcast` was updated to fix a bug (thanks to kalekundert)

8.10.0

------

* Changes to existing functions
 * The type stub for :func:`iter_except` was improved (thanks to  MarcinKonowalczyk)

* Other changes:
 *  Type stubs now ship with the source release (thanks to saaketp)
 *  The Sphinx docs were improved (thanks to MarcinKonowalczyk)

8.9.0

-----

* New functions
 * :func:`interleave_evenly` (thanks to mbugert)
 * :func:`repeat_each` (thanks to FinalSh4re)
 * :func:`chunked_even` (thanks to valtron)
 * :func:`map_if` (thanks to sassbalint)
 * :func:`zip_broadcast` (thanks to kalekundert)

* Changes to existing functions
 * The type stub for :func:`chunked` was improved (thanks to  PhilMacKay)
 * The type stubs for :func:`zip_equal` and `zip_offset` were improved (thanks to maffoo)
 * Building Sphinx docs locally was improved (thanks to MarcinKonowalczyk)

Links

• PyPI: https://pypi.org/project/more-itertools
• Changelog: https://pyup.io/changelogs/more-itertools/
• Repo: https://github.com/more-itertools/more-itertools
• Docs: https://pythonhosted.org/more-itertools/

[bradchiappetta]

Included in #534