message: Fix parameter typings of BasePrepare
diff: @@ -324,7 +324,7 @@ export class BasePrepare
  * or the callback function, if items have been added using `prepare.add`.
  * @param {Function} [done] - Optional callback when all queued uploads have completed
  */
  - upload(item: IDisplayObjectExtended | IUploadHook | IFindHook | (() => void), done?: () => void): void
  + upload(item: IDisplayObjectExtended | Container | BaseTexture | Texture | (() => void), done?: () => void): void
  {
  if (typeof item === 'function')
  {
  @@ -336,7 +336,7 @@ export class BasePrepare
  // that we could upload
  if (item)
  {
  - this.add(item as IDisplayObjectExtended | IUploadHook | IFindHook);
  + this.add(item as IDisplayObjectExtended | Container | BaseTexture | Texture);
  }
  // Get the items for upload from the display
  @@ -465,7 +465,7 @@ export class BasePrepare
  * add to the queue
  * @return Instance of plugin for chaining.
  */
  - add(item: IDisplayObjectExtended | IUploadHook | IFindHook): this
  + add(item: IDisplayObjectExtended | Container | BaseTexture | Texture): this
  {
  // Add additional hooks for finding elements on special
  // types of objects that
  