message: update return type of Dialog.getData
  According to the official V10 docs, as well as the foundry
  implementation, Dialog.getData will alway return an object made up of a
  "content" and a "buttons" property.
diff: @@ -60,7 +60,7 @@ declare class Dialog<Options extends DialogOptions = DialogOptions> extends Appl
  override get title(): string;
  - override getData(options?: Partial<Options>): MaybePromise<object>;
  + override getData(options?: Partial<Options>): { content: string; buttons: Record<string, Dialog.Button> };
  override activateListeners(html: JQuery): void;
  