add minification in the build

dist/editor/extensions/ext-locale/helloworld/en.js

@@ -1,11 +1 @@
-var en = {
-  name: 'Hello World',
-  text: 'Hello World!\n\nYou clicked here: {x}, {y}',
-  buttons: [
-    {
-      title: "Say 'Hello World'"
-    }
-  ]
-};
-
-export default en;
+export default{name:"Hello World",text:"Hello World!\n\nYou clicked here: {x}, {y}",buttons:[{title:"Say 'Hello World'"}]};

dist/editor/extensions/ext-locale/helloworld/zh_CN.js

@@ -1,11 +1 @@
-var zhCN = {
-  name: 'Hello World',
-  text: 'Hello World!\n\n 请点击: {x}, {y}',
-  buttons: [
-    {
-      title: "输出 'Hello World'"
-    }
-  ]
-};
-
-export default zhCN;
+export default{name:"Hello World",text:"Hello World!\n\n 请点击: {x}, {y}",buttons:[{title:"输出 'Hello World'"}]};