build(deps): bump loader-utils and webpack in /gotty/js

Bumps [loader-utils](https://github.com/webpack/loader-utils) to 1.4.2 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 1.4.2
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v1.4.2/CHANGELOG.md)
- [Commits](webpack/loader-utils@v1.1.0...v1.4.2)

Updates `webpack` from 2.5.1 to 5.75.0
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v2.5.1...v5.75.0)

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

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

Author: dependabot[bot]