Add SDK 46 as verified version

[Nantris]

I'm not sure what "builtin" means here, unless it means the React-Native version it was built against? Otherwise I think this PR is good to go, indicating support for SDK 46.

Thank you so much again @jakobo!

[jakobo]

Yep it works with the builtin. As part of #20, we specifically changed the Versions section to something more evergreen.

Versions

Starting with Expo SDK 46, Flipper manages its own compatibility layer (though it can be upgraded by specifying a version of Flipper that you want). Prior to SDK 46, we recommended running Flipper @ 0.123.0 as it had the widest range of compatibility with devices and simulators.

This package follows expo's policy for the deprecation of old SDKs. It's MAJOR version tracks against the Expo SDK version, making it easy to spot compatibility differences in your package.json file.