Add sunrise/sunset time to openweathermap (#182)

* Corrected temperatures in openweathermap.org backend

* Set the sunrise/sunset information from the api

* Print the astronomy information if present

* Fix rebase gone wrong

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Co-authored-by: alessandro <[email protected]>

Remove references to obsolete forecast.io backend

Add go module and update to Go 1.17 as minimum requirement.

fix config var name in wwo backend

release version 1.0