This a helper function that helps simulate ussd call

Example

iex> ExUssd.Utils.simulate(menu: ExUssd.Menu.render(
...>  name: "Home",
...>  handler: fn menu, _api_parameters, _should_handle ->
...>    menu
...>    |> Map.put(:title, "Welcome")
...>  end
...>),
...> text: "")
{:ok, "Welcome"}