[glib-networking] Try upgrading CI to F29

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 8b551b3fb2c4ad499a14fbadbb152463cd188ca1
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Wed Sep 19 10:03:08 2018 -0500

    Try upgrading CI to F29
    
    For the latest OpenSSL. Let's see if this works. I don't know of any way
    to discover available containers.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7c4358e..6fe7d95 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: fedora:28
+image: fedora:29
 
 variables:
   ADDITIONAL_DEPENDENCIES: gsettings-desktop-schemas gcc libasan