Summary:
Currently, if we has `defaultValue`, textAttributes like `letterSpacing` can works, but if textinput has not default text, when we typing the text, some attributes not applied.
[iOS] [Fixed] - Fix textAttributes not applied when typing text
Pull Request resolved: https://github.com/facebook/react-native/pull/23585
Differential Revision: D14206568
Pulled By: cpojer
fbshipit-source-id: 7db276d811684bf6e01f8d30287cca80095db87c