test(dtslint): add dtslint test on count operator (#4093) (#4139)
test(dtslint): add dtslint test on count operator (#4093) (#4139)


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