[geary: 2/2] Merge branch '439-appstream-glib' into 'mainline'

[Michael Gratton <mjog src gnome org>]

commit 5a87cf54367d3df4b9ea176a84d5976ef82aeafb
Merge: dc6788ee 7c42c5d8
Author: Michael Gratton <mike vee net>
Date:   Mon Jun 3 10:31:52 2019 +0000

    Merge branch '439-appstream-glib' into 'mainline'
    
    add appstream-glib dependency
    
    Closes #439
    
    See merge request GNOME/geary!243

 .gitlab-ci.yml | 6 +++---
 INSTALL        | 8 ++++----
 meson.build    | 3 +++
 3 files changed, 10 insertions(+), 7 deletions(-)
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