message: Fix: Change addChild() to require at least one DisplayObject argument
diff: @@ -142,7 +142,7 @@ export class Container extends DisplayObject
  * @param {...PIXI.DisplayObject} children - The DisplayObject(s) to add to the container
  * @return {PIXI.DisplayObject} The first child that was added.
  */
  - addChild<T extends DisplayObject[]>(...children: T): T[0]
  + addChild<T extends DisplayObject>(...children: [T, ...DisplayObject[]]): T
  {
  // if there is only one argument we can bypass looping through the them
  if (children.length > 1)
  