Bug fixed - the UIScrollView will break on iOS10 when building by XCode9 (#1896)

This only happens when you are using react-native@0.48.3, and your XCode is in version 9.0

ios/RCCViewController.m

 // rnn issue - https://github.com/wix/react-native-navigation/issues/1858
 - (void)_traverseAndFixScrollViewSafeArea:(UIView *)view {
 #ifdef __IPHONE_11_0
-  if ([view isKindOfClass:UIScrollView.class]) {
+  if ([view isKindOfClass:UIScrollView.class] && [view respondsToSelector:@selector(setContentInsetAdjustmentBehavior:)]) {
     [((UIScrollView*)view) setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];
   }