Change access of RenamePass.ConvertCaseString to allow external usage.

Author: tritao

src/Generator/Passes/RenamePass.cs

@@ -343,7 +343,7 @@ public override bool Rename(Declaration decl, out string newName)
         /// <param name="decl"></param>
         /// <param name="pattern">The cases.</param>
         /// <returns>string</returns>
-        static string ConvertCaseString(Declaration decl, RenameCasePattern pattern)
+        public static string ConvertCaseString(Declaration decl, RenameCasePattern pattern)
         {
             if (decl.Name.All(c => !char.IsLetter(c)))
                 return decl.Name;