message: Fix types for nullable filters
diff: @@ -214,7 +214,7 @@ export abstract class DisplayObject extends EventEmitter
  public visible: boolean;
  public renderable: boolean;
  public filterArea: Rectangle;
  - public filters: Filter[];
  + public filters: Filter[] | null;
  public isSprite: boolean;
  public isMask: boolean;
  public _lastSortedIndex: number;
  