chore(travis): stop caching node_modules because it’s causing false positives
chore(travis): stop caching node_modules because it’s causing false positives

like https://travis-ci.org/hoodiehq/ember-hoodie/builds/149897393

hoodiehq/ember-hoodie,brunopedroso/ember-hoodie,courajs/ember-hoodie,courajs/ember-hoodie,hoodiehq/ember-hoodie,brunopedroso/ember-hoodie