Update TravisCI configuration for newest node version.
Update TravisCI configuration for newest node version.

amos-ws16/amos-ws16-arrowjs,amos-ws16/amos-ws16-arrowjs-server,amos-ws16/amos-ws16-arrowjs,amos-ws16/amos-ws16-arrowjs-server,amos-ws16/amos-ws16-arrowjs