[gnome-software/gnome-3-30] Release version 3.30.3

[Kalev Lember <klember src gnome org>]

commit 95f1f916cbbfb39a3938bcacfb5bbbeb703a612a
Author: Kalev Lember <klember redhat com>
Date:   Thu Oct 18 15:32:52 2018 +0200

    Release version 3.30.3

 NEWS                                           | 17 +++++++++++++++++
 data/appdata/org.gnome.Software.appdata.xml.in | 17 +++++++++++++++++
 2 files changed, 34 insertions(+)
---
diff --git a/NEWS b/NEWS
index 82317a59..674705de 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,20 @@
+Version 3.30.3
+~~~~~~~~~~~~~~
+Released: 2018-10-18
+
+This is a stable release with the following changes:
+ * Fix a memory corruption issue on 32-bit arches that made gnome-software very
+   crashy
+ * Fix an issue with stuck back button on the details page after closing and
+   reopening gnome-software
+ * Make distro upgrades to Fedora N+2 release show up correctly
+ * Various flatpak plugin fixes
+ * Allow opening CAB files that include more than one update
+ * Fix critical warnings when quickly switching between category pages
+ * Small memory leak fixes
+
+This release also updates translations.
+
 Version 3.30.2
 ~~~~~~~~~~~~~~
 Released: 2018-10-05
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index df8fd3c0..6f0cdf4b 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -46,6 +46,23 @@
    Validate with `appstream-util validate *.appdata.xml`
   -->
   <releases>
+    <release date="2018-10-18" version="3.30.3">
+      <description>
+        <p>
+          This is a stable release with the following changes:
+        </p>
+        <ul>
+          <li>Fix a memory corruption issue on 32-bit arches that made gnome-software very crashy</li>
+          <li>Fix an issue with stuck back button on the details page after closing and reopening 
gnome-software</li>
+          <li>Make distro upgrades to Fedora N+2 release show up correctly</li>
+          <li>Various flatpak plugin fixes</li>
+          <li>Allow opening CAB files that include more than one update</li>
+          <li>Fix critical warnings when quickly switching between category pages</li>
+          <li>Small memory leak fixes</li>
+        </ul>
+        <p>This release also updates translations.</p>
+      </description>
+    </release>
     <release date="2018-10-05" version="3.30.2">
       <description>
         <p>