Hi Guix!

I've been sitting on this patch to update Clementine to 1.4 for quite a
while, patiently waiting for upstream to do their final release.
However since it appears to be broken on staging, I thought we should
update it anyway, so here it is! I've picked the first pre-release that
includes a fix for https://github.com/clementine-player/Clementine/issues/6701,
which is the reason for the current breakable.

I've split the re-indentation of the package definition in another
commit, otherwise the diff is impossible to review :-).

Let me know what you think!