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

(pin)