FIX: Enumerize::Value to handle callable i18n_scope dynamically

[devsigner]

To handle contextual local with proc
Ex:

    enumerize :license_type,
      in: [:student, :teacher, :user],
      i18n_scope: [
        -> { "enum.license_type/#{Current.application_platform}" },
        "models.article.enum.targets"
      ],
      scope: true,
      predicates: true

locales/enumerize.fr.yml

fr:
  enum:
    license_type: &license_types
      student: Élève
      teacher: Enseignant
      user: Particulier

    license_type/academic:
      <<: *license_types

    license_type/other:
      teacher: Enseignant
      student: Apprenant

Expect:

Current.application_platform = nil
Article.license_type.values["student"] # => "Élève"

Current.application_platform = :academic
Article.license_type.values["student"] # => "Élève"

Current.application_platform = :other
Article.license_type.values["student"] # => "Apprenant"