fix: add node 7-8 travis support (#1405)
fix: add node 7-8 travis support (#1405)


gergelyke/node-restify,myroid/node-restify,myroid/node-restify,restify/node-restify,restify/node-restify,kusor/node-restify,mcavage/node-restify,hekike/node-restify