Fixing update script to pass err correctly
Fixing update script to pass err correctly

ketus/generator-keystone,mgan59/generator-keystone,keystonejs/generator-keystone,w01fgang/generator-keystone,mgan59/generator-keystone-theme-pack-uno,steventux/generator-keystone-content,ketus/generator-keystone,mgan59/generator-keystone-theme-pack-uno,kristianmandrup/generator-keystone,Freakland/generator-keystone,w01fgang/generator-keystone,Freakland/generator-keystone,keystonejs/generator-keystone,steventux/generator-keystone-content,mgan59/generator-keystone,kidaa/generator-keystone,kidaa/generator-keystone,kristianmandrup/generator-keystone