Log Message:
py-more-itertools: updated to 8.3.0

8.3.0

* New itertools
    * :func:`zip_equal`

* Changes to existing itertools:
    * :func:`split_at`, :func:`split_before`, :func:`split_after`, and \ 
:func:`split_when` all got a ``maxsplit`` paramter
    * :func:`split_at` now accepts a ``keep_separator`` parameter
    * :func:`distinct_permutations` can now generate ``r``-length permutations
    * The :func:`windowed` implementation was improved
    * The :func:`spy` implementation was improved

* Other changes
    * Type stubs are now tested with ``stubtest``
    * Tests now run with ``python -m unittest`` instead of ``python setup.py test``