Set `hasEmitted` for `initialData`

FirebaseExtended / reactfire

Hooks, Context Providers, and Components that make it easy to interact with Firebase.

MIT License

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Closed jhuleatt closed 3 years ago

jhuleatt commented 3 years ago

Fixes #342

Have useObservable set hasEmitted to true when initialData is passed in
- Added a test to verify this behavior
Update ObservableStatus docs to make the values more clear