Update Ember to 3.1

config/environment.js

@@ -1,8 +1,11 @@
 /* jshint node: true */
+'use strict';
+
 module.exports = function(environment) {
-  var ENV = {
+
+  let ENV = {
     modulePrefix: 'kredits-web',
-    environment: environment,
+    environment,
     rootURL: '/',
     locationType: 'auto',
 
@@ -83,9 +86,11 @@ module.exports = function(environment) {
     ENV.APP.LOG_VIEW_LOOKUPS = false;
 
     ENV.APP.rootElement = '#ember-testing';
+    ENV.APP.autoboot = false;
   }
 
   if (environment === 'production') {
+    // here you can enable a production-specific feature
   }
 
   return ENV;