Add missing notification verification fields

appstore/notification.go

@@ -83,6 +83,7 @@ type SubscriptionNotification struct {
 	// Posted only if notification_type is RENEWAL or INTERACTIVE_RENEWAL.
 	ExpirationIntent string `json:"expiration_intent"`
 
+
 	// Auto renew info
 	AutoRenewStatus    string    `json:"auto_renew_status"` // false or true
 	AutoRenewProductID string `json:"auto_renew_product_id"`