Improve range trait

[alandefreitas]

The problem

The range trait does not work properly for all range types.

Proposed solution

A new range trait using the ADL std::begin/end functions, such as this:

• https://github.com/alandefreitas/futures/blob/master/include/futures/algorithm/traits/is_range.hpp

Other traits, such as is_iterator can also come from this reference repo.

Alternatives I've considered

The current implementation and the C++20 trait.

Additional context

This traits is very simple and it was enough for our purposes, but it's quite easy to change that to the correct traits.