[bug#53149] Update Kicad to 6.0.0

[Leo Famulari]

On Sun, Jan 09, 2022 at 10:45:50PM +0000, phodina via Guix-patches via wrote:
> Hi,
> 
> this patch series updates Kicad to version 6.0.0. Guix lint shows newer 
> version 6.99.0 but that's intended for development of the next major release.
> 
> The list of changes are described here [1].
> 
> [1] https://www.kicad.org/blog/2021/12/KiCad-6.0.0-Release/

Thanks for these patches!

They do not apply to the Guix master branch, because our Kicad package
is currently at version 5.1.12. Can you rebase your commits and send a
revised patch series?