Log Message:
misc/wthrr: update to 0.4.0

New Features
 - Hourly forecasts with graphs for current day: #18

Breaking Changes
 - Use enum values and toml table for config units: #17
 - If you have saved a default configuration, it's required to modify the
   configuration file to use a toml table for [units] instead of an array of
   strings (~/.config/weathercrab/wthrr.toml).
   Deleting the file and starting with a blank run is also possible.

Other Changes:
 - UI improvements like bold titles and closing margins on separators and
   borders
 - Error corrections displaying translated texts