Update dependency webpack to v4.25.0

Author: renovate-bot

web/package-lock.json

@@ -32,7 +32,7 @@
     "find-nearest-file": "1.1.0",
     "pages-webpack-plugin": "0.2.0",
     "stats-webpack-plugin": "0.7.0",
-    "webpack": "4.24.0",
+    "webpack": "4.25.0",
     "webpack-cli": "3.1.2",
     "webpack-node-externals": "1.7.2",
     "webpack-partial": "2.2.0"