Fmi-weather-client

- Dropped support for weather station observations
- Unreliable
- Difficult to use
- Use forecast data instead

- Fixed invalid parameters
- Fixed invalid HTTP status code handling

- Support for fetching forecasts

- Weather report now includes snow depth and WaWa code
- It is possible to get a weather report which is combined from multiple stations
- Increased bounding box size because I managed to found some blind spots

- **BREAKING CHANGE**: `Weather.measurement_time` renamed to `Weather.observation_time`
- Sorry! 😜
- Added logging
- Added typing
- Refactoring

**FIXES**
- Fixes error when station contains no data
- Fixes error when station contains only `NaN` values
- Fixes issues with timestamp and coordinate handling

**CHANGES**
Previous version had a rule that came from my own need. The rule doesn't really make sense since it makes assumptions about the use-case. So, I decided to remove it. Now the client returns exactly what FMI provides and that might mean data from a station that provides only cloud coverage and nothing more.