Update getObjects.ts

Author: Octave Raimbault

packages/client-search/src/methods/index/getObjects.ts

@@ -7,7 +7,7 @@ export const getObjects = (base: SearchIndex) => {
   return <TObject>(
     objectIDs: readonly string[],
     requestOptions?: RequestOptions & GetObjectsOptions
-  ): Readonly<Promise<GetObjectsResponse<TObject>>> => {
+  ): Readonly<Promise<GetObjectsResponse<TObject> | null>> => {
     const { attributesToRetrieve, ...options } = requestOptions || {};
 
     const requests = objectIDs.map(objectID => {