message: fix: additive check
diff: @@ -716,7 +716,7 @@ export default class Animator<T> {
  constructor(target: T, loop: boolean, additiveTo?: Animator<any>[]) {
  this._target = target;
  this._loop = loop;
  - if (loop) {
  + if (loop && additiveTo) {
  logError('Can\' use additive animation on looped animation.');
  return;
  }
  