updated: enabled sudo on the travis build
updated: enabled sudo on the travis build

annxingyuan/ca,annxingyuan/reinforce,nikhilaravi/reinforce,annxingyuan/reinforce,nikhilaravi/reinforce,annxingyuan/starter_kit,annxingyuan/ca,annxingyuan/starter_kit,annxingyuan/reinforce,nikhilaravi/reinforce,GianlucaGuarini/es6-project-starter-kit