function lazyResult (render, tree) {
  return {
    get html () {
      return render(tree, tree.options)
    },
    tree,
    messages: tree.messages
  }
}
Wraps the PostHTMLTree within an object using a getter to render HTML on demand.

@private

@param   {Function} render
@param   {Array}    tree
@returns {Object<{html: String, tree: Array}>}