增加cheetah-grid依赖，增加一条watch命令用于外网调试

package.json

@@ -2,6 +2,7 @@
   "name": "d2-admin",
   "version": "1.20.1",
   "scripts": {
+    "watch": "vue-cli-service serve --open",
     "serve": "vue-cli-service serve --open --host localhost",
     "start": "npm run serve",
     "dev": "npm run serve",
@@ -30,6 +31,7 @@
     "sortablejs": "^1.10.1",
     "ua-parser-js": "^0.7.20",
     "vue": "^2.6.11",
+    "vue-cheetah-grid": "^1.7.6",
     "vue-i18n": "^8.15.1",
     "vue-router": "^3.1.3",
     "vuex": "^3.1.2"