added: prepublish task
added: prepublish task

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