fix(package): specify supported npm version
fix(package): specify supported npm version

adrianomelo/RxJS-1,martinsik/rxjs,jadbox/RxJS,gluck/RxJS,elliotschi/rxjs,ReactiveX/RxJS,martinsik/rxjs,Igorbek/rxjs5,adrianomelo/RxJSNext,elliotschi/rxjs,justinwoo/RxJS,Brocco/RxJS,benlesh/RxJS,kwonoj/RxJS,SangKa/RxJS-Docs-CN,ReactiveX/rxjs,figueredo/RxJS,martinsik/rxjs,adrianomelo/RxJSNext,staltz/RxJSNext,Brocco/RxJS,gluck/RxJS,saneyuki/RxJS,mattpodwysocki/RxJS,ReactiveX/rxjs,adrianomelo/RxJS-1,jadbox/RxJS,RxJS-CN/RxJS-Docs-CN,gluck/RxJS,SangKa/RxJS-Docs-CN,mattpodwysocki/RxJS,RxJS-CN/RxJS-Docs-CN,adrianomelo/RxJSNext,kwonoj/RxJS,trxcllnt/RxJS,RxJS-CN/RxJS-Docs-CN,luisgabriel/RxJS,Igorbek/rxjs5,ReactiveX/rxjs,justinwoo/RxJS,trxcllnt/RxJS,saneyuki/RxJS,benlesh/RxJS,elliotschi/rxjs,luisgabriel/RxJS,kwonoj/RxJS,Igorbek/rxjs5,ReactiveX/RxJS,adrianomelo/RxJSNext,Igorbek/rxjs5,robwormald/RxJS,Brocco/RxJS,ReactiveX/rxjs,jayphelps/rxjs,jadbox/RxJS,martinsik/rxjs,justinwoo/RxJS,adrianomelo/RxJS-1,jayphelps/rxjs,jinroh/RxJS,figueredo/RxJS,IgorMinar/RxJS,SangKa/RxJS-Docs-CN,robwormald/RxJS,IgorMinar/RxJS,mattpodwysocki/RxJS,ReactiveX/RxJS,mattpodwysocki/RxJS,staltz/RxJSNext,gluck/RxJS,justinwoo/RxJS,jayphelps/rxjs,jinroh/RxJS,jinroh/RxJS,staltz/RxJSNext,figueredo/RxJS,kwonoj/RxJS,robwormald/RxJS,luisgabriel/RxJS,luisgabriel/RxJS,robwormald/RxJS,jayphelps/rxjs,SangKa/RxJS-Docs-CN,jadbox/RxJS,RxJS-CN/RxJS-Docs-CN,figueredo/RxJS,jayphelps/rxjs,elliotschi/rxjs,ReactiveX/RxJS,trxcllnt/RxJS,jinroh/RxJS,trxcllnt/RxJS,Brocco/RxJS,benlesh/RxJS,staltz/RxJSNext,adrianomelo/RxJS-1,benlesh/RxJS