Merge pull request #2907 from drewnoakes/threejs

Fix incorrect signature of JSONLoader.parse(...)

threejs/three.d.ts

@@ -1782,7 +1782,7 @@ declare module THREE {
 
         loadAjaxJSON(context: JSONLoader, url: string, callback: (geometry: Geometry, materials: Material[]) => void , texturePath?: string, callbackProgress?: (progress: Progress) => void ): void;
 
-        parse(json:string, texturePath:string): any;
+        parse(json: any, texturePath?: string): { geometry: Geometry; materials?: Material[] };
     }
 
     export interface JSonLoaderResultGeometry extends Geometry {