update package.json

package.json

@@ -39,8 +39,7 @@
     "wangeditor": ">=3.0.0",
     "codemirror": "^5.38.0",
     "mavon-editor": "^2.7.0",
-    "path-to-regexp": "2.4.0",
-    "babel-polyfill": "^6.26.0"
+    "path-to-regexp": "2.4.0"
   },
   "devDependencies": {
     "autoprefixer": "8.5.0",
@@ -93,7 +92,8 @@
     "webpack-bundle-analyzer": "2.13.1",
     "webpack-cli": "3.1.0",
     "webpack-dev-server": ">= 3.1.11",
-    "webpack-merge": "4.1.4"
+    "webpack-merge": "4.1.4",
+    "babel-polyfill": "^6.26.0"
   },
   "engines": {
     "node": ">= 6.0.0",