add webpack for dev

Author: linux-china

src/main/frontend/package.json

@@ -24,7 +24,6 @@
     "core-js": "^2.4.1",
     "jquery": "^3.2.1",
     "node-sass": "^4.5.3",
-    "webpack": "^3.6.0",
     "rxjs": "^5.4.3",
     "zone.js": "^0.8.16"
   },
@@ -45,6 +44,7 @@
     "protractor": "~5.1.0",
     "ts-node": "^3.3.0",
     "tslint": "~5.7.0",
+    "webpack": "^3.6.0",
     "typescript": "^2.5.2"
   }
 }