FIX: [Storage] Don't try resolving the promise twice if an error occu…

…rs in listAll()

See https://github.com/firebase/firebase-ios-sdk/blob/14764b8d60a6ad023d8fa5b7f81d42378d92e6fe/FirebaseStorage/Sources/FIRStorageReference.m#L417

packages/storage/ios/RNFBStorage/RNFBStorageModule.m

@@ -194,7 +194,16 @@ - (void)invalidate {
 ) {
   FIRStorageReference *storageReference = [self getReferenceFromUrl:url app:firebaseApp];
 
+  __block bool alreadyCompleted = false;
+
   id completionBlock = ^(FIRStorageListResult *result, NSError *error) {
+    // This may be called multiple times if an error occurs
+    // Make sure we won't try to resolve the promise twice in this case
+    // See https://github.com/firebase/firebase-ios-sdk/blob/14764b8d60a6ad023d8fa5b7f81d42378d92e6fe/FirebaseStorage/Sources/FIRStorageReference.m#L417
+    if(alreadyCompleted) {
+      return;
+    }
+    alreadyCompleted = true;
     if (error != nil) {
       [self promiseRejectStorageException:reject error:error];
     } else {