build: update pug-lint-config-uncovertruth requirement to ^4.0.0 (#537)
build: update pug-lint-config-uncovertruth requirement to ^4.0.0 (#537)

Updates the requirements on [pug-lint-config-uncovertruth](https://github.com/uncovertruth/styleguide) to permit the latest version.
- [Release notes](https://github.com/uncovertruth/styleguide/releases)
- [Commits](https://github.com/uncovertruth/styleguide/commits/v4.0.0)
uncovertruth/examples,uncovertruth/examples