CubeCamera.d.ts: Add options parameter.

src/cameras/CubeCamera.d.ts

@@ -1,11 +1,12 @@
 import { WebGLRenderTargetCube } from './../renderers/WebGLRenderTargetCube';
+import { WebGLRenderTargetOptions } from './../renderers/WebGLRenderTarget';
 import { Scene } from './../scenes/Scene';
 import { WebGLRenderer } from './../renderers/WebGLRenderer';
 import { Object3D } from './../core/Object3D';
 
 export class CubeCamera extends Object3D {
 
-	constructor( near?: number, far?: number, cubeResolution?: number );
+	constructor( near?: number, far?: number, cubeResolution?: number, options?: WebGLRenderTargetOptions );
 
 	type: 'CubeCamera';