title: Set range in IntegerRangeField
body: <p>I have a model:</p>
  
  <pre><code>from django.contrib.postgres.fields import IntegerRangeField
  
  class Album(models.Model):
      rating = IntegerRangeField(default=0)
  </code></pre>
  
  <p>I want to set maximum and minimum value for default validation purpose. There is already an <a href="https://stackoverflow.com/a/33773128/2566671">answer</a> , but that validation will not run automatically.</p>
  
  <p>So How to set a min and max value in the <code>rating</code> field ?</p>