Merge pull request #1032 from scratchfoundation/renovate/webpack-4.x

chore(deps): update dependency webpack to v4.47.0

Author: cwillisf

package-lock.json

@@ -42,7 +42,7 @@
     "tap": "11.1.5",
     "travis-after-all": "1.4.5",
     "uglifyjs-webpack-plugin": "1.3.0",
-    "webpack": "4.46.0",
+    "webpack": "4.47.0",
     "webpack-cli": "3.3.12",
     "webpack-dev-server": "3.11.2"
   },