Update yambar to version 1.9.0 / rev 3 via SR 1043791
    
    https://build.opensuse.org/request/show/1043791
    by user uncomfyhalomacro + dimstar_suse
    - Simplify specfile and just use the defined C standard in meson config.
    - Update to version 1.9.0:
      * Added
    	- Support for specifying number of decimals when printing a float tag.
    	- Support for custom font fallbacks.
    	- overline: new decoration.
    	- i3/sway: boolean option `strip-workspace-numbers`.
    	- font-shaping: new inheritable configuration option, allowing you to
    	- configure whether strings should be _shaped_ using HarfBuzz, or not.
    	- river: support for the new “mode” event present in version 3 of the
    	- river status manager protocol, in the form of a new tag, _”mode”_,
    	- in the `title` particle.
    	- network: request link stats and expose under tags `dl-speed` and
    	- `ul-speed` when `poll-interval` is set.
    	- new module: disk-io.
    	- new module: pulse.
    	- alsa: `dB` tag.
    	- mpd: `f