Summary:
The relevant changes in the PR are to Libraries/StyleSheet/EdgeInsetsPropType.js; the rest are just removals of FlowIgnores.
The definition of the relevant types is [here](https://github.com/facebook/flow/blob/master/lib/react.js#L262-L271).
The long and short of it is that for whatever reason, Flow is unable to realize that `ReactPropsChainableTypeChecker` is a subtype of `ReactPropsCheckType` unless we assert it. Once we explicitly hint this to the typechecker, it realizes that `EdgeInsetsPropType` is indeed a valid React PropType, and stops complaining that it isn't.
Closes https://github.com/facebook/react-native/pull/16437
Differential Revision: D6109742
Pulled By: sahrens
fbshipit-source-id: e4e10720b68c912d0372d810409f389b65d7f4b1
Summary:
`CheckBox` component was introduced in v0.49.0 and not implemented on iOS.
Users who are trying to use `CheckBox` on iOS will get a warning that
> Native component for "AndroidCheckBox" does not exist
We should declare in the document that this component is Android only and use `UnimplementedView` for iOS.
- Use `react-native init` new project
- Apply pull request changes
- Add `<Checkbox />` after welcome text in `App.js`
- Run the app in iOS simulator
Closes https://github.com/facebook/react-native/pull/16211
Differential Revision: D6005393
Pulled By: hramos
fbshipit-source-id: 1c9b68b5e1c933496c4d7c2f487f0500264b603a
