JSX: Recognize nested tags inside attributes

[noahlt]

Abstract React components are not well-supported; Emmet doesn't seem to recognize nested tags inside attributes, because it uses HTML logic for parsing tags, and this only happens in JSX.

Given this example:

export default function Test() {
  return (
    <AbstractComponent
      render={() => {
        return (
          <p>example</p>
        );
      }}
    />
  );
}

If you select the <p> element and run "wrap with abbreviation", it tries to wrap the entire <AbstractComponent ... /> rather than just the <p>example</p>.

Thanks for all your wonderful work on Emmet!