Bug#900051: libgnupg-interface-perl: t/get_public_keys.t fails with gnupg2/2.2.7-1

[intrigeri]

FWIW it's unlikely that I have time to work on this myself before
DebCamp *but* if they've not been solved by then, fixing these
regressions will be one of my top priorities at DebCamp (ideally with
someone else).