* Update `ddcctl` submodule.
* Update dependencies.
* Enable displays by default.
* Retry more often to get values from display.
* Only print when debugging.
Fix#13
- Key handling is now done in the app, close#3
- All code linted with SwiftLint, close#4
- Better handling of built-in screen
Signed-off-by: Guillaume Broder <iamnotheoneyouseek@gmail.com>