Upgrade node to version ^6.9.0
Upgrade node to version ^6.9.0

KageKirin/Ghost-kagekirinblog,kiloev/ghost-on-heroku,toddjordan/presentationtier,zubietaroberto/bocadoabocado,JohnHillegass/my-ghost-blog,toddjordan/presentationtier,JohnHillegass/my-ghost-blog,legendtang/ghost-qiniu-heroku,welbornio/ghost-on-heroku,KageKirin/Ghost-kagekirinblog,piotrekzyla/cash-traumatic-modernities,jessica-jordan/blog,cuonghapvn/ghost-to-heroku,juyeong/ghost-on-heroku,zubietaroberto/bocadoabocado,cobyism/ghost-on-heroku,janraasch/ghost-on-heroku,kiloev/ghost-on-heroku,cobyism/ghost-on-heroku,ember-weekend/ember-weekend-blog,legendtang/ghost-qiniu-heroku,jessica-jordan/blog,piotrekzyla/cash-traumatic-modernities,janraasch/ghost-on-heroku,ember-weekend/ember-weekend-blog,gaissa/ghost-on-heroku,janraasch/ghost-on-heroku,juyeong/ghost-on-heroku,welbornio/ghost-on-heroku