feat(travis): update travis configuration
feat(travis): update travis configuration

Ismaestro/angular2-tour-of-heroes,Ismaestro/angular2-tour-of-heroes,Ismaestro/angular4-example-app,Ismaestro/angular4-example-app,Ismaestro/angular2-tour-of-heroes,Ismaestro/angular4-example-app