Bump webpack from 4.29.6 to 4.30.0 in /js

Bumps [webpack](https://github.com/webpack/webpack) from 4.29.6 to 4.30.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.29.6...v4.30.0)

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

js/package.json

@@ -40,7 +40,7 @@
     "vue-loader": "^15.7.0",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.10",
-    "webpack": "^4.29.6",
+    "webpack": "^4.30.0",
     "webpack-cli": "^3.3.0",
     "webpack-merge": "^4.2.1"
   },