增加webpack依赖

package.json

@@ -100,7 +100,8 @@
     "node-sass": "^4.14.1",
     "postcss-comment": "^2.0.0",
     "sass-loader": "^7.3.1",
-    "vue-template-compiler": "^2.6.11"
+    "vue-template-compiler": "^2.6.11",
+    "webpack": "^4.46.0"
   },
   "browserslist": [
     "Android >= 4.4",