[gedit-plugins/ci] Missing dep

[Jordi Mas <jmas src gnome org>]

commit e3a2e4dc86a18df7549e1c94dddabc2cd1219427
Author: Jordi Mas <jmas softcatala org>
Date:   Fri May 10 19:11:06 2019 +0200

    Missing dep

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b434b15..4c3accc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,7 +9,7 @@ build:
     - apt-get install libgit2-glib-1.0-dev libglib2.0-dev libgtk-3-dev -y
     - apt-get install libgtksourceview-4-dev libgucharmap-2-90-dev libpeas-dev -y
     - apt-get install valac libvte-2.91-dev libzeitgeist-2.0-dev gedit-dev -y
-    - apt-get install python3 python3-dbus python-dbus-dev python3-gi -y
+    - apt-get install python3 python3-dbus python-dbus-dev python3-gi appstream -y
     - apt-get install meson ninja-build -y
 
   script: