Bump webpack from 4.41.6 to 4.42.0 in /js

Bumps [webpack](https://github.com/webpack/webpack) from 4.41.6 to 4.42.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.41.6...v4.42.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

js/package.json

@@ -39,7 +39,7 @@
     "vue-loader": "^15.9.0",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.11",
-    "webpack": "^4.41.6",
+    "webpack": "^4.42.0",
     "webpack-cli": "^3.3.11",
     "webpack-merge": "^4.2.2"
   },