title: Three.js DecalGeometry is not a constructor
body: <p>I've installed and imported three.js as a module (v0.100.0) like:</p>
  
  <pre><code>import * as THREE from 'three';
  ...
  var d = new THREE.DecalGeometry(. . .);
  </code></pre>
  
  <p>Getting error message that DecalGeometry is not a constructor.
  Looking in src directory for the three module, there is no DecalGeometry anywhere. What is happening? </p>