scaffolding: bump amber dep to ^0.24.0.

grunt-init-project/template.js

@@ -118,7 +118,7 @@ exports.template = function (grunt, init, done) {
         props.dependencies = {
             "@ambers/contrib-jquery": "^0.6.0",
             "@ambers/contrib-web": "^0.7.0",
-            "@ambers/lang": "^0.23.2",
+            "@ambers/lang": "^0.24.0",
             "@ambers/domite": "^0.9.0",
             "es6-promise": "^4.2.6",
             "@ambers/silk": "^0.5.1"