Adjusted forwardRef to be callback

[bluenote10]

I still don't understand what a forwardRef is semantically. According to the type definitions it is the same as a ref, but in #14 you mentioned it is a callback. Does this just need an adjustment of the type definition here?

[ryansolid]

I needed a way to pass a ref out from a DOM element to its Component. Like this:

const Component = props => <div forwardRef={props.ref} />

const App = props => {
  let someRef;
  return <Component ref={someRef} />
}

This compiles to:

const Component = props => function () {
  const _el$ = _tmpl$.content.firstChild.cloneNode(true);
  props.ref && props.ref(_el$);
  return _el$;
}();

const App = props => {
  let someRef;
  return Component({ ref: r$ => someRef = r$ });
};

So as it turns out I added a function based ref on DOM nodes unintentionally. Not sure if I should make a thing out of it. In any case the type looks like it was wrong. Thanks for the PR. I will merge immediately. Although it might take me a little bit to get it published to npm. I am right in the middle of some refactoring.