* Bump ruby to 2.7.8
* Bump listen to 3.5.1 (remove dependency on ruby_dep)
* Bump ruby to 3.0.6
* Fix I18n.translate arguments: from hash to keyword arguments
* add dark-mode support
* make improvements as suggested by riggraz
* fix some dark theme styles
Co-authored-by: Riccardo Graziosi <riccardo.graziosi97@gmail.com>