code: function updateUrl (cb, urlNode, options) {
    return cb(urlNode.url, options)
      .then((response) => {
        if (response) {
          Object.assign(urlNode, response)
        }
      })
      .catch(() => {
      })
  }
docs: Updates the url of the image or link node by calling the
  callback promise
  
  @method updateUrl
  
  @param  {Function} cb
  @param  {Object}   urlNode
  @param  {Object}   options
  
  @return {Promise}