Changed default method queue to a background queue.

React/Modules/RCTAlertManager.m

@@ -35,6 +35,11 @@ RCT_EXPORT_MODULE()
   return self;
 }
 
+- (dispatch_queue_t)methodQueue
+{
+  return dispatch_get_main_queue();
+}
+
 /**
  * @param {NSDictionary} args Dictionary of the form
  *

React/Modules/RCTStatusBarManager.m

@@ -26,6 +26,11 @@ static BOOL RCTViewControllerBasedStatusBarAppearance()
 
 RCT_EXPORT_MODULE()
 
+- (dispatch_queue_t)methodQueue
+{
+  return dispatch_get_main_queue();
+}
+
 RCT_EXPORT_METHOD(setStyle:(UIStatusBarStyle)statusBarStyle
                   animated:(BOOL)animated)
 {

React/Modules/RCTTiming.m

@@ -108,6 +108,11 @@ RCT_IMPORT_METHOD(RCTJSTimers, callTimers)
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }
 
+- (dispatch_queue_t)methodQueue
+{
+  return dispatch_get_main_queue();
+}
+
 - (BOOL)isValid
 {
   return _bridge != nil;