build: use node 4 for release
build: use node 4 for release

overlookmotel/sequelize,sequelize/sequelize,PhinCo/sequelize,jayprakash1/sequelize,p0vidl0/sequelize,yjwong/sequelize,mikeringrose/sequelize,majorleaguesoccer/sequelize,Americas/sequelize,konnecteam/sequelize,PsiXdev/sequelize,cbauerme/sequelize,grimurd/sequelize,yonjah/sequelize,Alexsey/sequelize,sequelize/sequelize,inDream/sequelize,sequelize/sequelize,overlookmotel/sequelize,inDream/sequelize,konnecteam/sequelize,jayprakash1/sequelize,Wsiegenthaler/sequelize,nemisj/sequelize,Americas/sequelize