Release v4.0.2

Fixed

• Fixed Rails 7.2 compatibility for the serialize: field option. Rails 7.2 changed
  serialize from a positional second argument to keyword-only (coder: / type:),
  causing an ArgumentError in any app using serialize: Array, serialize: Hash,
  serialize: JSON, or a custom coder. The fix branches on Rails version and uses
  the correct keyword API for Rails ≥ 7.2:
  • serialize: true → serialize(attr, coder: ::YAML)
  • serialize: Array / serialize: Hash → serialize(attr, coder: ::YAML, type: ClassName)
  • serialize: JSON → serialize(attr, coder: JSON)
  • serialize: MyCoder (custom coder) → serialize(attr, coder: MyCoder)
    Note: ::YAML is used explicitly rather than relying on default_column_serializer,
    which is nil by default in Rails 7.2 apps using load_defaults 7.2.