fix: remove distinct from search state stream (algolia#21)

Author: aallam

helper_dart/lib/src/hits_searcher.dart

@@ -63,7 +63,6 @@ class HitsSearcher {
  HitsSearcher._(this.searchService, this._state, Duration debounce)
  : responses = _state.stream
  .debounceTime(debounce)
- .distinct()
  .switchMap(searchService.search),
  _log = algoliaLogger('HitsSearcher');