updates .travis.yml to use Node 4.2.2 and NPM 3.4.0
updates .travis.yml to use Node 4.2.2 and NPM 3.4.0

jmcmurry/monarch-app,monarch-initiative/monarch-app,kshefchek/monarch-app,monarch-initiative/monarch-app,DoctorBud/monarch-app,jmcmurry/monarch-app,jmcmurry/monarch-app,monarch-initiative/monarch-app,kshefchek/monarch-app,DoctorBud/monarch-app,kshefchek/monarch-app,kshefchek/monarch-app,monarch-initiative/monarch-app,DoctorBud/monarch-app,monarch-initiative/monarch-app,DoctorBud/monarch-app,kshefchek/monarch-app,DoctorBud/monarch-app,jmcmurry/monarch-app,jmcmurry/monarch-app