[gnome-mahjongg/bilelmoussaoui/appdata] Appdata: add OARS and releases tags.

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 6f9e9b810d2fbb9e19a68ffd24970d3256beef4f
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Mon Jun 10 14:11:33 2019 +0000

    Appdata: add OARS and releases tags.
    
    Required to publish this game on Flathub: see https://github.com/flathub/flathub/pull/1032

 data/org.gnome.Mahjongg.appdata.xml.in | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/data/org.gnome.Mahjongg.appdata.xml.in b/data/org.gnome.Mahjongg.appdata.xml.in
index 6369329..22e7eaf 100644
--- a/data/org.gnome.Mahjongg.appdata.xml.in
+++ b/data/org.gnome.Mahjongg.appdata.xml.in
@@ -26,6 +26,9 @@
       <image>https://people.gnome.org/~mcatanzaro/gnome-mahjongg.png</image>
     </screenshot>
   </screenshots>
+  <releases>
+    <release version="3.32.0" data="2019-03-11" />
+  </releases>
   <launchable type="desktop-id">org.gnome.Mahjongg.desktop</launchable>
   <url type="homepage">https://wiki.gnome.org/Apps/Mahjongg</url>
   <url type="bugtracker">https://gitlab.gnome.org/GNOME/gnome-mahjongg/issues</url>
@@ -40,4 +43,5 @@
     <kudo>UserDocs</kudo>
   </kudos>
   <translation type="gettext">gnome-mahjongg</translation>
+  <content_rating type="oars-1.1" />
 </component>