stancjs flag added

src/stancjs/stancjs.ml

@@ -19,6 +19,7 @@ let stan2cpp model_name model_string is_flag_set flag_val :
   Typechecker.model_name := model_name;
   Typechecker.check_that_all_functions_have_definition :=
     not (is_flag_set "allow_undefined" || is_flag_set "allow-undefined");
+  Identifiers.allow_unicode := is_flag_set "allow-unicode";
   Transform_Mir.use_opencl := is_flag_set "use-opencl";
   Lower_program.standalone_functions :=
     is_flag_set "standalone-functions" || is_flag_set "functions-only";