Summary:
`hermes-eslint` is built by Meta to work with the latest Flow code.
It follows the latest ESLint standards and AST, and has a true scope analyser to ensure best compatibility with core ESLint rules.

Reviewed By: motiz88

Differential Revision: D37181192

fbshipit-source-id: 1f59e01f306792e67a4977435c5c77e0000d960a