Update `babel-eslint` and `eslint` to latest.
Update `babel-eslint` and `eslint` to latest.

jordansexton/bookshelf,bookshelf/bookshelf,seegno-forks/bookshelf,tgriesser/bookshelf,bookshelf/bookshelf,jordansexton/bookshelf,tgriesser/bookshelf,jadengore/bookshelf,rbong/bookshelf,TinOo512/bookshelf,jadengore/bookshelf,seegno-forks/bookshelf,TinOo512/bookshelf,jadengore/bookshelf,rbong/bookshelf