Wetterdienst

Fix
- Fix monthly/annual data of DWD observations

Refactor
- Simplify parameters using only one enumeration for flattened and detailed parameters
- Rename dataset SUNSHINE_DURATION to SUN to avoid complications with similar named parameter and dataset
- Rename parameter VISIBILITY to VISIBILITY_RANGE

Feature
- Add datasets EXTREME_WIND (subdaily) and MORE_WEATHER_PHENOMENA (daily)
- Add support for Python 3.10 and drop Python 3.7

Feature
- Extend explorer to use all implemented APIs

Fix
- Fix cli/restapi: return json and use NULL instead of NaN

Fix
- Fix missing station ids within values result
- Add details about time interval for NOAA GHCN stations
- Fix falsely calculated station distances

Feature
- Add support for Python 3.10, drop support for Python 3.7

Feature
- Add Wetterdienst.Settings to manage general settings like tidy, humanize,...
- Rename DWD forecast to mosmix
- Instead of "kind" use "network" attribute to differ between different data products of a provider

Fix
- Change data source of NOAA GHCN after problems with timeouts when reaching the server
- Fix problem with timezone conversion when having dates that are already timezone aware

Fix
- Fix cli error with upgraded click ^8.0 where default False would be converted to "False"