Bug#1087613: upstream issue https://github.com/pimutils/khal/issues/1367

[Sébastien Delafond]

The corresponding upstream issue is
https://github.com/pimutils/khal/issues/1367, and boils down to an
incompatibility with icalendar >= 6. I confirmed the patch from
https://github.com/pimutils/khal/pull/1364 fixes it.

Cheers,

-- 
Seb