Require GpgME 1.20
This version offers support for Qt 6 and fixes a serious regression in 1.19 (which added support for Qt 6).
GnuPG-bug-id: 6631
@bcooksley Linux and FreeBSD CI already have GpgME 1.21 (libkleo's CMakeLists.txt prints the version)
Depends on packaging/craft-blueprints-kde!576 (merged)
Edited by Ingo Klöcker