chore(travis): update node versions tested
chore(travis): update node versions tested

kuiqiang/cvp,Spirovanni/ampdin,datatypevoid/ng2-mean-webpack,Spirovanni/ampdin,datatypevoid/vulgar,kubaszumiato/DotNetVideos,juansaucedo/develook,rschellius/vulgar,juansaucedo/develook,rschellius/vulgar,kuiqiang/cvp,angeltrickz/prueba_vulgar,angeltrickz/prueba_vulgar,datatypevoid/vulgar,kubaszumiato/DotNetVideos,kuiqiang/cvp,gunnertech/rednotebook,rschellius/vulgar,kubaszumiato/DotNetVideos,datatypevoid/ng2-mean-webpack,Spirovanni/ampdin,datatypevoid/vulgar,angeltrickz/prueba_vulgar,juansaucedo/develook,datatypevoid/ng2-mean-webpack