Add default parameter for GDTask.Never

Author: Joy-less

addons/GDTask/GDTask.Factory.cs

@@ -154,15 +154,15 @@ public static GDTask<T> Defer<T>(Func<GDTask<T>> factory)
         /// <summary>
         /// Never complete.
         /// </summary>
-        public static GDTask Never(CancellationToken cancellationToken)
+        public static GDTask Never(CancellationToken cancellationToken = default)
         {
             return new GDTask<AsyncUnit>(new NeverPromise<AsyncUnit>(cancellationToken), 0);
         }
 
         /// <summary>
         /// Never complete.
         /// </summary>
-        public static GDTask<T> Never<T>(CancellationToken cancellationToken)
+        public static GDTask<T> Never<T>(CancellationToken cancellationToken = default)
         {
             return new GDTask<T>(new NeverPromise<T>(cancellationToken), 0);
         }