message: Add `FinalizationRegistry` to the extra library definitions.
diff: @@ -167,3 +167,12 @@ interface ResizeObserver {
  declare const ResizeObserver: {
  new(callback: ResizeObserverCallback): ResizeObserver;
  };
  +
  +interface FinalizationRegistry {
  + register(obj: any, heldValue: any, token?: any): void;
  + unregister(token: any): void;
  +}
  +
  +declare const FinalizationRegistry: {
  + new(callback: (heldValue: any) => void): FinalizationRegistry;
  +};
  