Fixed issue #116.

Author: phongcao

ios/RCTAzureNotificationHubManager/RCTAzureNotificationHandler.m

@@ -10,6 +10,8 @@
 #import "RCTAzureNotificationHub.h"
 #import "RCTAzureNotificationHandler.h"
 
+extern RCTPromiseResolveBlock requestPermissionsResolveBlock;
+
 @implementation RCTAzureNotificationHandler
 {
 @private
@@ -107,6 +109,7 @@ - (void)userNotificationSettingsRegistered:(nonnull NSNotification *)notificatio
     };
 
     resolve(notificationTypes);
+    requestPermissionsResolveBlock = nil;
 }
 
 @end

ios/RCTAzureNotificationHubManager/RCTAzureNotificationHubManager.m

@@ -23,8 +23,8 @@
 RCT_EXTERN NSString *const RCTErrorUnspecified;
 
 static RCTAzureNotificationHandler *notificationHandler;
-static RCTPromiseResolveBlock requestPermissionsResolveBlock;
-static RCTPromiseRejectBlock requestPermissionsRejectBlock;
+RCTPromiseResolveBlock requestPermissionsResolveBlock;
+RCTPromiseRejectBlock requestPermissionsRejectBlock;
 
 @implementation RCTAzureNotificationHubManager
 {