build: inline CJS source maps (#2970)
build: inline CJS source maps (#2970)

Fixes #2934
benlesh/RxJS,Brocco/RxJS,martinsik/rxjs,kwonoj/RxJS,trxcllnt/RxJS,kwonoj/RxJS,ReactiveX/rxjs,kwonoj/RxJS,jayphelps/rxjs,benlesh/RxJS,ReactiveX/RxJS,martinsik/rxjs,ReactiveX/rxjs,trxcllnt/RxJS,jayphelps/rxjs,martinsik/rxjs,Brocco/RxJS,kwonoj/RxJS,martinsik/rxjs,ReactiveX/rxjs,ReactiveX/RxJS,IgorMinar/RxJS,Brocco/RxJS,benlesh/RxJS,Brocco/RxJS,trxcllnt/RxJS,jayphelps/rxjs,benlesh/RxJS,jayphelps/rxjs,ReactiveX/RxJS,trxcllnt/RxJS,ReactiveX/rxjs,jayphelps/rxjs,ReactiveX/RxJS,IgorMinar/RxJS