chore(test): expand browser coverage
chore(test): expand browser coverage

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