Handle enum items in rename pass.

src/Generator/Passes/RenamePass.cs

@@ -271,6 +271,16 @@ namespace CppSharp.Passes
             return true;
         }
 
+        public override bool VisitEnumDecl(Enumeration @enum)
+        {
+            VisitDeclaration(@enum);
+
+            foreach (var item in @enum.Items)
+                VisitEnumItemDecl(item);
+
+            return true;
+        }
+
         public override bool VisitFieldDecl(Field field)
         {
             return VisitDeclaration(field);