exposed CubeCamera.clear() to TS

src/cameras/CubeCamera.d.ts

@@ -11,11 +11,8 @@ export class CubeCamera extends Object3D {
 
 	renderTarget: WebGLRenderTargetCube;
 
-	/**
-	 * @deprecated Use {@link CubeCamera#update .update()} instead
-	 */
-	//updateCubeMap(renderer: Renderer, scene: Scene): void;
-
 	update( renderer: WebGLRenderer, scene: Scene ): void;
 
+	clear( renderer: WebGLRenderer, color: boolean, depth: boolean, stencil: boolean ): void;
+
 }