(fix): Exported few missing types from gcp firestore

Author: lahirumaramba

src/firestore/index.ts

@@ -28,8 +28,10 @@ import { FirestoreService } from './firestore-internal';
 export {
   BulkWriter,
   BulkWriterOptions,
+  BundleBuilder,
   CollectionGroup,
   CollectionReference,
+  DocumentChange,
   DocumentChangeType,
   DocumentData,
   DocumentReference,
@@ -40,16 +42,19 @@ export {
   FirestoreDataConverter,
   GeoPoint,
   GrpcStatus,
+  OrderByDirection,
   Precondition,
   Query,
   QueryDocumentSnapshot,
   QueryPartition,
   QuerySnapshot,
   ReadOptions,
   Settings,
+  SetOptions,
   Timestamp,
   Transaction,
   UpdateData,
+  WhereFilterOp,
   WriteBatch,
   WriteResult,
   v1,