Obviously, there is no Twig template for the ezstarrating field type yet.

Steps to reproduce:

• Add a "star rating" attribute to any content class
• Try to render this field in a twig template, e.g.
  {{ ez_render_field( content, 'rating' ) }}

Result: An exception is thrown.
"An exception has been thrown during the rendering of a template ("Cannot find 'ezsrrating_field' template block.") in MyBundle:embed:article.html.twig at line 30."