Fix ember-try

Author: joshsmith

config/ember-try.js

@@ -36,17 +36,9 @@ module.exports = {
     },
     {
       name: 'ember-lts-2.12',
-      bower: {
-        dependencies: {
-          'ember': 'components/ember#lts-2-12'
-        },
-        resolutions: {
-          'ember': 'lts-2-12'
-        }
-      },
       npm: {
         devDependencies: {
-          'ember-source': null
+          'ember-source': '~2.12.0'
         }
       }
     },