fixed buttons text attributes revert on press

ios/RCCNavigationController.m

       NSMutableDictionary *buttonTextAttributes = [RCTHelpers textAttributesFromDictionary:button withPrefix:@"button"];
       if (buttonTextAttributes.allKeys.count > 0) {
         [barButtonItem setTitleTextAttributes:buttonTextAttributes forState:UIControlStateNormal];
+        [barButtonItem setTitleTextAttributes:buttonTextAttributes forState:UIControlStateHighlighted];
       }
     }
     else if (component) {