[firebase_storage] Filtering for list method not implemmented

[arlucio]

Using googleapis package I can do:

entries = await storageApi.objects.list(
          bucketId,
          delimiter: '/',
          prefix: startMonthPrefix,
          startOffset: startDateAddress,
          endOffset: endDateAddress,
        );

using firebase_storage, the ListOption only offer

  const ListOptions({
    this.maxResults,
    this.pageToken,
  });

I really need the prefix and offset options for my application so I still have to use googleapis, would be awesome if this parameters could be added to ListOptions as well.