RTNSorter.m

- (void)sort:(NSMutableArray *)arr resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject {
    NSMutableArray <NSNumber *>*foo = [[NSMutableArray alloc] initWithArray:arr copyItems:YES];

    for (int i = 0; i < [foo count]; i++) {
        for (int j = 0; j < [foo count] - 1; j++) {
          if (foo[j + 1].integerValue < foo[j].integerValue) {
            NSInteger a = foo[j].integerValue;
            foo[j] = foo[j + 1];
            foo[j + 1] = @(a);
          }
        }
    }
  
    resolve(foo);
}