code: def updates(self):
          
          url = urljoin(self.base_url, 'updates.json')
          response = self._get_sync(url)
          return {
              'items': self.get_items_by_ids(item_ids=response['items']),
              'profiles': self.get_users_by_ids(user_ids=response['profiles'])
          }
docs: Returns list of item ids and user ids that have been
          changed/updated recently.
  
          Fetches data from URL:
              https://hacker-news.firebaseio.com/v0/updates.json
  
          Returns:
              `dict` with two keys whose values are `list` objects