Changes necessary to upgrade for reason-react-native@63

The problem

Due to the API changes made in React Native, this lib is no longer compatible with the latest reason-react-native.
Unfortunately, I have a ton of code using the compat module still and it is not feasible for me to get rid of it still :(

Considered solution

So I'm trying to patch this package to make it compatible with the latest reason-react-native and I'm trying to follow the changes made in the PRs of reason-react-native. Based on the type errors I got from the compiler I think they are the following:

  1. Accessibility changes for 0.63 rescript-react-native#728
  2. [0.62] handle deprecated or removed components and APIs rescript-react-native#668
  3. FlatList, SectionList, VirtualizedSectionList: Make separator props Js.t objects, not records rescript-react-native#727

Are there any others?

And by the way, thanks for thinking about this compat mode!