[gitg/gnome-3-30] flatpak: Stick to 3.30 runtime

[Alberto Fanjul <albfan src gnome org>]

commit 093cd8d780219a9f27ef6bcf2321707ecd0b2a0d
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Thu Nov 29 09:54:42 2018 +0100

    flatpak: Stick to 3.30 runtime

 org.gnome.gitg.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/org.gnome.gitg.json b/org.gnome.gitg.json
index f6f09472..7b7327eb 100644
--- a/org.gnome.gitg.json
+++ b/org.gnome.gitg.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "org.gnome.gitg",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
+    "runtime-version" : "3.30",
     "branch" : "master",
     "sdk" : "org.gnome.Sdk",
     "command" : "gitg",