title: Property 'DecalGeometry' does not exist on type 'typeof "..node_modules/@types/three/index"'
body: <p>I am using 'three.js' and 'three-decal-geometry' with an Angular6 application. See below for imports:</p>
  
  <pre><code>import * as THREE from 'three';
  import * as OBJLoader from 'three-obj-loader';
  import * as DecalGeometry from 'three-decal-geometry';
  OBJLoader(THREE);
  </code></pre>
  
  <p>When I try to call THREE.DecalGeometry, I get the follow error message: </p>
  
  <pre><code>Property 'DecalGeometry' does not exist on type 'typeof "..node_modules/@types/three/index"'. 
  Did you mean 'DirectGeometry'?
  </code></pre>
  
  <p>My package.json:</p>
  
  <pre><code>"dependencies": {
      "@angular/cdk": "^6.2.0",
      "three": "^0.84.0",
      "three-decal-geometry": "^1.0.0",
      "three-obj-loader": "^1.1.3"
  }
  
  "devDependencies": {
     "@types/three": "^0.92.15",
     "@angular/cli": "~6.0.7",
  }
  </code></pre>
  
  <p>I am not sure why I cannot use the DecalGeometry library. I did npm i three-decal-geometry and even tried including </p>
  
  <pre><code>&lt;script src="THREE.DecalGeometry.js" &gt;&lt;/script&gt;
  </code></pre>
  
  <p>in index.html as directed in <a href="https://www.npmjs.com/package/three-decal-geometry" rel="nofollow noreferrer">https://www.npmjs.com/package/three-decal-geometry</a></p>