Declare main eslintrc as `root` (#2830)
Declare main eslintrc as `root` (#2830)

It will prevent config lookup to exit Mocha's project folder.
mochajs/mocha,JohnnyEstilles/mocha,JohnnyEstilles/mocha,adamgruber/mocha,mochajs/mocha,outsideris/mocha,adamgruber/mocha,hoverduck/mocha,adamgruber/mocha,hoverduck/mocha,boneskull/mocha,igwejk/mocha,hoverduck/mocha,hoverduck/mocha,mochajs/mocha,boneskull/mocha,igwejk/mocha,JohnnyEstilles/mocha,outsideris/mocha,boneskull/mocha