fix error in "update all" - fixes #285

Author: sindresorhus

lib/routes/update.js

@@ -27,9 +27,9 @@ module.exports = function (app) {
     name: 'generators',
     message: 'Generators to update',
     type: 'checkbox',
-    choices: (app.generators || []).map(function (generator) {
+    choices: Object.keys(app.generators || {}).map(function (key) {
       return {
-        name: generator.name,
+        name: app.generators[key].name,
         checked: true
       };
     })