Update package.json

package.json

@@ -4,7 +4,7 @@
   "description": "A small clone of [github](https://github.com/MixJiang/GameBee)",
   "main": "js/game.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "dev": "live-server"
   },
   "repository": {
     "type": "git",
@@ -12,5 +12,8 @@
   },
   "author": "CDL_LuFei",
   "license": "MIT"
+    "dependencies": {
+    "live-server": "^1.2.2"
+
 }