message: fix(aio): fix SearchService to work with TypeScript 2.4
  The call to `race` required a type parameter to disambiguate the return type.
  PR Close
diff: @@ -45,7 +45,7 @@ export class SearchService {
  initWorker(workerUrl: string, initDelay: number) {
  const searchResults = Observable
  // Wait for the initDelay or the first search
  - .race(
  + .race<any>(
  Observable.timer(initDelay),
  this.searchesSubject.first()
  )
  