The `&` has a wrong scope name

[aziz]

& is a keyword so it should get a scope like keyword.control.parent-ref.css.sass. It currently gets entity.name.tag.css.sass.symbol

[P233]

I rewrote this package and updated lots of scope names. But sorry, when I was rewriting this package I forget this issues, and I named the & scope to keyword.other.parent-selector.sass. Do you think that is ok, or keyword.control.parent-ref.css.sass is better? Thanks