Add the tabBar trait to the title strip scrollview

This way, the accessibility service will say "tab" for the buttons instead of "button", it will point out the selected one and will tell how many there are.

Pod/Classes/MRGPagerTitleStrip.m

@@ -60,6 +60,8 @@ - (instancetype)initWithFrame:(CGRect)frame {
         _separatorColor = [UIColor colorWithWhite:1 alpha:0.2f];
 
         _scrollView = [[UIScrollView alloc] init];
+        _scrollView.isAccessibilityElement = NO;
+        _scrollView.accessibilityTraits = _scrollView.accessibilityTraits | UIAccessibilityTraitTabBar;
         _scrollView.scrollsToTop = NO;
         _scrollView.showsHorizontalScrollIndicator = NO;
         _scrollView.showsVerticalScrollIndicator = NO;