Truncation of large objects

Thanks for the library! One problem I tend to have with it is that sometimes a function argument will be something very large, like a list of 1000s of strings, and it would still be nice to log this function call with logwrap, but it just clutters the log. I think a nice solution would be to add a `max_iterable_length` parameter similar to the `max_indent` parameter we already have.