Fix TypedArray.wrap definition - #939

Considering that the implementation isn't generic, wouldn't it be straight-forward to model the declaration exactly like that by adding one .wrap to each subclass with a concrete return type? Would otherwise imagine that someone could try to use it as a generic function with unexpected results.

I simplified this. I guess this completely solved issue

Considering that the implementation isn't generic, wouldn't it be straight-forward to model the declaration exactly like that by adding one .wrap to each subclass with a concrete return type?

What about this?

static wrap<_T = TypedArray<number>>(this: Constructor<_T>, ...): _T;

That's ideal, thanks! :)