Summary:
Enums are currently exposed to the JS package as constants (e.g. `import {ERRATA_NONE} from 'yoga-layout'`).
This exports enums in the form of `import {Errata} from 'yoga-layout'` then `Errata.None`.
It would be more ergonomic for these to be string union based enums instead, but right now it is a pretty thin wrapper around the native API, we need ordinal values to do things with bit masks, and folks have wanted to serialize them before.
Reviewed By: yungsters
Differential Revision: D45570417
fbshipit-source-id: 04568224569fa85801de7a265f9633cfcfa92a2f
