message: Fix Loader signal typings
diff: @@ -789,13 +789,13 @@ namespace Loader
  * When the loader starts loading resources it dispatches this callback.
  * @param loader - The loader that has started loading resources.
  */
  - export type OnCompleteSignal = (loader: Loader, resource: LoaderResource) => void;
  + export type OnCompleteSignal = (loader: Loader, resources: Dict<LoaderResource>) => void;
  /**
  * When an error occurrs the loader and resource are disaptched.
  * @param loader - The loader the error happened in.
  * @param resource - The resource that caused the error.
  */
  - export type OnErrorSignal = (loader: Loader, resource: LoaderResource) => void;
  + export type OnErrorSignal = (error: Error, loader: Loader, resource: LoaderResource) => void;
  }
  export { Loader };
  