Cbor bug fixes

Example.Frontend/ClientBasedPrinter.cs

@@ -13,6 +13,11 @@ namespace Example.Frontend
             return Task.CompletedTask;
         }
 
+        public Task SetFingerPrint(int[] fingerPrint)
+        {
+            return Task.CompletedTask;
+        }
+
         public void OnPrintExternal(IPage p0, RequestContext ro)
         {
         }

Example.Frontend/Program.cs

@@ -51,6 +51,11 @@ class Program
 
         using (var disposingPrinter = factory.Create("Test"))
         {
+            disposingPrinter.SetFingerPrint(new[] { 1, 2, 3 }).ContinueWith(r =>
+            {
+                Console.WriteLine(r.Status);
+            });
+            
             DemoCheck.CreatingPrinter = true;
             disposingPrinter.OnPrint += (_, _) =>
             {