Summary:
[iOS] [Changed] - As #22990 said, move requireNativeComponent to a separate file.
I am not familiar with flow, I try to follow the https://pastebin.com/RFpdT76V example but I am not sure I have done it right.
Pull Request resolved: https://github.com/facebook/react-native/pull/22996
Differential Revision: D13697082
Pulled By: cpojer
fbshipit-source-id: c0c87a8e1a7f0553da994aba230f69b496140200
