I think this is just engineer that works at Facebook created project with same name in their free time, not Facebook the company made such a naming decision.
Here's why I think so: commits coming from Facebook in facebook and facebook-experimental github orgs have additional metadata fields like "Reviewed By:", "Differential Revision:", "fbshipit-source-id:": https://github.com/facebook/react-native/commit/864cdf338369...
If you look at the Facebook React Native project, you can see the commit where they switched from the OP's tool to their own version.