KCalendarCore Require Libcal 3.0

[Volker Krause]

On Dienstag, 17. November 2020 18:10:22 CET Allen Winter wrote:
> Release Team,
> 
> Unless there are objections, I'd like to require libical v3.0 in
> kcalendarcore. libical v3.0.0 was released over 3 years ago (28 Oct 2017)
> 
> @Volker: you are the kcalendarcore maintainer.  any objections?

Wait, what!? I always thought that was you :D 
We should fix that if it's noted wrongly somewhere.

Regards,
Volker