Merge pull request #16491 from Mugen87/dev32

TS: Add dispose() to Scene.d.ts

src/scenes/Scene.d.ts

@@ -29,4 +29,5 @@ export class Scene extends Object3D {
 
   copy(source: this, recursive?: boolean): this;
   toJSON(meta?: any): any;
+  dispose(): void;
 }