title: How make select2 readonly?
body: <p>I know that "readonly" feature does not exist for select2. Please check <a href="https://github.com/select2/select2/issues/3387" rel="noreferrer">here</a>.
  How do I achieve that?
  Any help would be appreciated.
  Thanks. 
  Note: I cant use disabled. If I use disabled, I will not get the list of selected value.</p>