[gnome-maps: 1/8] use 3.28 runtime

[Marcus Lundblad <mlundblad src gnome org>]

commit 7e1fb93b3bfc1749bbab4669b2f86ea0f60adc3a
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sun Jun 24 13:56:39 2018 +0200

    use 3.28 runtime
    
    Seems there's a problem with run using master

 org.gnome.Maps.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/org.gnome.Maps.json b/org.gnome.Maps.json
index 098aa67..c3259b7 100644
--- a/org.gnome.Maps.json
+++ b/org.gnome.Maps.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "org.gnome.Maps",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
+    "runtime-version" : "3.28",
     "sdk" : "org.gnome.Sdk",
     "command" : "gnome-maps",
     "tags" : [