fix(package): update webpack to version 2.3.2 (#1502)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -88,7 +88,7 @@
     "unfetch": "2.1.2",
     "url": "0.11.0",
     "uuid": "3.0.1",
-    "webpack": "2.3.1",
+    "webpack": "2.3.2",
     "webpack-dev-middleware": "1.10.1",
     "webpack-hot-middleware": "2.17.1",
     "write-file-webpack-plugin": "4.0.0"