Update node.js version in readme
Update node.js version in readme

ryana/sg-stats,mikejihbe/hummingbird,umaxfun/hummingbird,ramr/openshift-hummingbird-example,soeffing/tracking_pixel,ramr/openshift-hummingbird-example,umaxfun/hummingbird,mnutt/hummingbird,mnutt/hummingbird,ramr/openshift-hummingbird-example,mikejihbe/hummingbird,soeffing/tracking_pixel,umaxfun/hummingbird,mnutt/hummingbird,ryana/sg-stats