refactor(repeat): Use `OperatorSubscriber`, don't return subscription in `operate`
refactor(repeat): Use `OperatorSubscriber`, don't return subscription in `operate`

martinsik/rxjs,ReactiveX/rxjs,benlesh/RxJS,kwonoj/RxJS,kwonoj/RxJS,ReactiveX/rxjs,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/RxJS,benlesh/RxJS,kwonoj/RxJS,ReactiveX/RxJS,benlesh/RxJS,martinsik/rxjs,benlesh/RxJS,ReactiveX/rxjs,ReactiveX/RxJS,ReactiveX/rxjs,kwonoj/RxJS,martinsik/rxjs