Log Message:
ansiweather: Update to 1.13.0

Patch submitted by Frederic Cambus, who takes maintainership.

Upstream changelog
==================
AnsiWeather 1.13.0 (2018-07-16)

- Do not attempt to fetch UV data when in forecast mode

AnsiWeather 1.12.0 (2018-06-29)

- Replace spaces in city names by '%20', underscores are not accepted
  anymore by the OpenWeatherMap API
- Add support for fetching and displaying UV index
- Document the UV index feature and related flags and options

AnsiWeather 1.11 (2017-06-21)

- Unicode symbols display is now off by default
- Shorten default greeting text: "Current weather" => \ 
"Weather"