GitLab

* Update some JS dependencies

- Update selective dependencies that are compatible with webpack 4. We
can not upgrade to webpack 5 yet because `license-webpack-plugin` is
incompatible.
- Enable a few new eslint rules and fix new issues

* fix comment
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: zeripath <art27@cantab.net>