Remove node 5 from .travis.yml as `postinstall` fails on it
Remove node 5 from .travis.yml as `postinstall` fails on it

gund/ng2-http-interceptor,gund/ng-http-interceptor,gund/ng-http-interceptor,gund/ng2-http-interceptor,gund/ng-http-interceptor,gund/ng2-http-interceptor