Fixing build failure caused by dependancies updating

webapp/package.json

@@ -34,12 +34,12 @@
     "velocity-animate": "1.2.3"
   },
   "devDependencies": {
-    "babel-core": "6.10.4",
+    "babel-core": "6.13.2",
     "babel-eslint": "6.1.2",
     "babel-loader": "6.2.4",
     "babel-plugin-transform-runtime": "6.9.0",
     "babel-polyfill": "6.9.1",
-    "babel-preset-es2015-webpack": "6.4.1",
+    "babel-preset-es2015": "6.13.2",
     "babel-preset-react": "6.11.1",
     "babel-preset-stage-0": "6.5.0",
     "copy-webpack-plugin": "3.0.1",