Bump loader-utils and webpack in /js

Bumps [loader-utils](https://github.com/webpack/loader-utils) to 1.4.1 and updates ancestor dependency [webpack](https://github.com/webpack/webpack). These dependencies need to be updated together.


Updates `loader-utils` from 1.1.0 to 1.4.1
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v1.4.1/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v1.1.0...v1.4.1)

Updates `webpack` from 2.5.1 to 5.74.0
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v2.5.1...v5.74.0)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
- dependency-name: webpack
  dependency-type: direct:development
...

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

js/package.json

@@ -4,7 +4,7 @@
         "ts-loader": "^2.0.3",
         "typescript": "^2.3.2",
         "uglifyjs-webpack-plugin": "^1.0.0-beta.2",
-        "webpack": "^2.5.1"
+        "webpack": "^5.74.0"
     },
     "dependencies": {
         "libapps": "github:yudai/libapps#release-hterm-1.70",