@type t() :: %ExIbge.Calendar.Release{
  editorial: String.t() | nil,
  id: integer() | nil,
  product: String.t() | nil,
  product_url: String.t() | nil,
  release_date: String.t() | nil,
  release_situation: String.t() | nil,
  release_type_id: integer() | nil,
  release_type_name: String.t() | nil,
  research_id: integer() | nil,
  research_name: String.t() | nil,
  research_url: String.t() | nil,
  title: String.t() | nil
}