Changes
- Calculate the timezone of the AstroWeather instance based on the configured timezone. This makes it possible to configure multiple instances of AstroWeather for different locations with potentially different time zones.
Fixes
- [Issue 16](https://github.com/mawinkler/astroweather/issues/16) and [Issue #17](https://github.com/mawinkler/astroweather/issues/17): The introduction of the module [timezonefinder](https://github.com/jannikmi/timezonefinder) with it's nested dependency to [py-h3](https://github.com/uber/h3-py) failed while compiling the `c`-module h3 on some home assistant deployment variants (e.g. Home Assistant Operating System on RPi). The config flow now allows selecting the timezone for the specific AstroWeather instance for which reason the dependency to `timezonefinder` is not required anymore.