pass onCompleted to useImperativeReference (etc)

[rbalicki2]

useImperativeReference should take an onCompleted. Anything that takes a FetchOptions should probably take an onCompelted.

These APIs should take objects instead of separate params as well, e.g.

  loadFragmentReference: (
    variables: ExtractParameters<TReadFromStore>,
    options: { fetchOptions?: FetchOptions, onCompleted?: () => void }
  ) => void;

etc

[rbalicki2]

closed by 71ffc760f69554f462fc404c72c9c60d8ff26774