Update dependency webpack to v4.42.1

Author: renovate-bot

{{ cookiecutter.project_slug }}/client/package-lock.json

@@ -55,7 +55,7 @@
     "ts-jest": "25.2.1",
     "ts-loader": "6.2.1",
     "typescript": "3.8.3",
-    "webpack": "4.42.0",
+    "webpack": "4.42.1",
     "webpack-cli": "3.3.11",
     "webpack-dev-server": "3.10.3"
   },