Update more-itertools to 10.3.0

[pyup-bot]

This PR updates more-itertools from 10.1.0 to 10.3.0.

Changelog

10.3.0

------

* New functions
 * :func:`powerset_of_sets`, :func:`dft`, and :func:`idft` (thanks to rhettinger)
 * :func:`join_mappings` (thanks to NeilGirdhar and rhettinger)
 * :func:`doublestarmap` (thanks to Skeen, monk-time, DamianB-BitFlipper, and ergoithz)
 * :func:`unique` (thanks to rhettinger)

* Changes to existing functions
 * :func:`collapse`, :func:`chunked_even`, :func:`ichunked`, :func:`padded`, and :func:`windowed` were optimized and improved (thanks to james-wasson)
 * :func:`totient` was optimized (thanks to rhettinger)
 * :func:`roundrobin` was updated and improved (thanks to rhettinger)
 * :func:`all_equal` now accepts a *key* parameter.
 * The docs for :func:`value_chain` were improved (thanks to bjrtx)
 * The type annotations for :class:`countable` were improved (thanks to aidanholm)

* Other changes
 * Unit tests were improved (thanks to haukex)
 * Some documentation issues were fixed (thanks to bjrtx and DimitriPapadopoulos)

10.2.0

------

* New functions
 * :func:`iter_suppress` (thanks to jaraco, pochmann, and rhettinger)
 * :func:`filter_map` (thanks to struktured)
 * :func:`classify_unique` (thanks to haukex)
 * :func:`totient` (from the itertools docs)
 * :func:`reshape` (from the itertools docs)

* Changes to existing functions
 * :func:`factor`, :func:`iter_index`, :func:`sieve`, and :func:`unique_justseen` were updated to match the itertools docs
 * :func:`first` was was optimized (thanks to pochmann)
 * :func:`takewhile_inclusive` was was refactored (thanks to eltoder)
 * :func:`combination_with_replacement_index` was was optimized (thanks to elliotwutingfeng and rhettinger)
 * :func:`nth_permutation`, :func:`nth_combination_with_replacement`, :func:`combination_index`, and :func:`combination_with_replacement_index` were optimized (thanks to rhettinger)
 * :func:`batched` now accepts a `strict` argument (adapted from itertools docs)
 * :func:`time_limited` was improved for Windows (thanks to haukex)

* Other changes
 * Several typing updates were made (thanks to obaltian and ilai-deutel)
 * Some documentation issues were fixed (thanks to F-park, DimitriPapadopoulos, peterbygrave, shuuji3, eltoder, and homeworkprod)

Links

• PyPI: https://pypi.org/project/more-itertools
• Changelog: https://data.safetycli.com/changelogs/more-itertools/
• Docs: https://pythonhosted.org/more-itertools/