- Added support for using strongly-typed objects instead of dicts for updating service settings at runtime.

  Instead of, say:

  ```python
  await task.queue_frame(
      STTUpdateSettingsFrame(settings={"language": Language.ES})
  )
  ```

  you'd do:

  ```python
  await task.queue_frame(
      STTUpdateSettingsFrame(delta=DeepgramSTTSettings(language=Language.ES))
  )
  ```

  Each service now vends strongly-typed classes like `DeepgramSTTSettings` representing the service's runtime-updatable settings.