extend default blacklist

Author: lofcz

src/FastCloner/Code/FastClonerExprGenerator.cs

@@ -564,7 +564,10 @@ private static object GenerateMemberwiseCloner(Type type, ExpressionPosition pos
         "System.Net.",
         "System.Reflection.",
         "System.IO.",
-        "System.Runtime."
+        "System.Runtime.",
+        "System.Threading.",
+        "System.Text.Json.",
+        "System.Diagnostics."
     ]);
 
     private static readonly Dictionary<string, Func<Type, object?>> specialNamespaces = new Dictionary<string, Func<Type, object?>>