feat(reverse): introduce reverse

[ryoppippi]

Hi! |'d like to add reverse function, so I implemented.
idk what is the right way to write JSDoc for this library, so please fix the docs!

Thanks as always 🍜

[lambdalisue]

I’m sorry, but we should use [...iter].reverse() instead. Reversing requires consuming all items of the iterator, which is why there’s no difference between reverse(iter) and [...iter].reverse().

For the same reason, sort-related functions are not provided either.

[ryoppippi]

OK, thanks. I'll use reverse() method!
Thank you for taking your time !