Summary:
- Improve type inference of the `event.easing` keyboard event property with the `KeyboardEventEasing` type.
- Exporting `KeyboardEventName` and `KeyboardEventEasing` for others to use.
- Removing unnecessary optional property flag (ie.`?`) for all properties in `KeyboardEvent`. (I personally haven't seen any of the properties not being returned for all keyboard events).
[iOS] [Changed] - Refine Keyboard API Event typings
Pull Request resolved: https://github.com/facebook/react-native/pull/23272
Differential Revision: D13941758
Pulled By: cpojer
fbshipit-source-id: 4891898c29cf6963069dbe6b4d439694761fd9e7