Log Message:
py-more-itertools: updated to 4.1.0

4.1.0
New itertools:
- split_at
- circular_shifts
- make_decorator - see the blog post Yo, I heard you like decorators for a tour
- always_reversible
- nth_combination (from the Python 3.7 docs)
Improvements to existing itertools:
- seekable now has an elements method to return cached items.
- The performance tradeoffs between roundrobin and interleave_longest are now \ 
documented