title: How to create a package with the isolatedModules=true option enabled?
body: <p>In a file where I export all the classes of my package on lines like the following:</p>
  
  <pre><code>export {default as BoundList, IBoundListOption, TBoundListFilterFn} from './list/BoundList';
  </code></pre>
  
  <p>errors of the form are generated:</p>
  
  <pre><code>TS1205: Cannot re-export a type when the '--isolatedModules' flag is provided.
  </code></pre>
  
  <p>How do I export classes now?</p>
  
  <p>This problem occurred in CRA2.1. There was forced to isolatedModules=true.
  I'm making a component library on CRA2.1</p>