Results 1 comments of xavier

What about doing like I did [in my PR](https://github.com/TheRealReal/ecto-ulid/pull/7/files) ? Code will be managed in [Ecto.Type here](https://github.com/elixir-ecto/ecto/blob/1d286c9b58515880f51155e4fd0ab19a6d184735/lib/ecto/type.ex#L165)