Flip `K` and `Q`

Hi @cuviper, in the https://github.com/indexmap-rs/indexmap/issues/253#issuecomment-1459160166, it was mentioned that flipping `K` and `Q` can avoid some annoying turbofish. The solution in the comment also applies to https://github.com/crossbeam-rs/crossbeam/pull/1132. Is it a good idea to apply the flipping to this crate now?