fix(storage): Typo in updateMetadata method (#2029)

updateMetatdata should be updateMetadata, keep the old method name for backward compatibility

Author: s2young

src/storage/ref.ts

@@ -9,6 +9,7 @@ export interface AngularFireStorageReference {
   delete(): Observable<any>;
   child(path: string): any;
   updateMetatdata(meta: SettableMetadata): Observable<any>;
+  updateMetadata(meta: SettableMetadata): Observable<any>;
   put(data: any, metadata?: UploadMetadata | undefined): AngularFireUploadTask;
   putString(data: string, format?: string | undefined, metadata?: UploadMetadata | undefined): AngularFireUploadTask;
 }
@@ -33,6 +34,7 @@ export function createStorageRef(ref: Reference, scheduler: FirebaseZoneSchedule
     delete: () => from(ref.delete()),
     child: (path: string) => createStorageRef(ref.child(path), scheduler),
     updateMetatdata: (meta: SettableMetadata) => from(ref.updateMetadata(meta)),
+    updateMetadata: (meta: SettableMetadata) => from(ref.updateMetadata(meta)),
     put: (data: any, metadata?: UploadMetadata) => {
       const task = ref.put(data, metadata);
       return createUploadTask(task);