Update package.json
Update package.json

prevent bluemix to use node 0.12
hansb001/tradeoff-analytics-nodejs,hansb001/tradeoff-analytics-nodejs,rotemah/tradeoff-analytics-nodejs,watson-developer-cloud/tradeoff-analytics-nodejs,GruppoPotente/tradeoff-analytics-nodejs,SidSachdev/tradeoff-analytics-nodejs,SidSachdev/tradeoff-analytics-nodejs,watson-developer-cloud/tradeoff-analytics-nodejs,suresh/helio,suresh/helio,rotemah/tradeoff-analytics-nodejs,GruppoPotente/tradeoff-analytics-nodejs