chore(dangerfile): fix test for hot and cold usages without types
chore(dangerfile): fix test for hot and cold usages without types

Fix logic in test for files which use hot and cold helpers but
do not provide type declarations for them, so that files that do not
use hot and cold helpers at all would not count as false positives.

trxcllnt/RxJS,RxJS-CN/RxJS-Docs-CN,ReactiveX/rxjs,Brocco/RxJS,SangKa/RxJS-Docs-CN,trxcllnt/RxJS,kwonoj/RxJS,Brocco/RxJS,Brocco/RxJS,ReactiveX/RxJS,martinsik/rxjs,RxJS-CN/RxJS-Docs-CN,ReactiveX/rxjs,jayphelps/rxjs,ReactiveX/rxjs,jayphelps/rxjs,kwonoj/RxJS,martinsik/rxjs,staltz/RxJSNext,ReactiveX/RxJS,benlesh/RxJS,SangKa/RxJS-Docs-CN,SangKa/RxJS-Docs-CN,IgorMinar/RxJS,staltz/RxJSNext,trxcllnt/RxJS,SangKa/RxJS-Docs-CN,jayphelps/rxjs,staltz/RxJSNext,kwonoj/RxJS,RxJS-CN/RxJS-Docs-CN,martinsik/rxjs,staltz/RxJSNext,benlesh/RxJS,Brocco/RxJS,martinsik/rxjs,ReactiveX/RxJS,benlesh/RxJS,ReactiveX/rxjs,kwonoj/RxJS,trxcllnt/RxJS,RxJS-CN/RxJS-Docs-CN,jayphelps/rxjs,ReactiveX/RxJS,benlesh/RxJS,IgorMinar/RxJS,jayphelps/rxjs