add tests

Author: yyx990803

package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "build": "webpack --config example/webpack.config.js",
-    "dev": "webpack --config example/webpack.config.js --watch"
+    "dev": "webpack --config example/webpack.config.js --watch",
+    "test": "webpack --config test/webpack.config.js && mocha test/test.build.js"
   },
   "repository": {
     "type": "git",
@@ -24,10 +25,12 @@
   },
   "homepage": "https://github.com/vuejs/vue-classy#readme",
   "devDependencies": {
-    "babel-core": "^5.6.7",
-    "babel-loader": "^5.2.0",
-    "node-libs-browser": "^0.5.2",
-    "vue": "^1.0.4",
-    "webpack": "^1.9.12"
+    "babel-core": "^5.8.0",
+    "babel-loader": "^5.3.3",
+    "chai": "^3.5.0",
+    "mocha": "^2.4.5",
+    "node-libs-browser": "^1.0.0",
+    "vue": "^1.0.16",
+    "webpack": "^1.12.12"
   }
 }