[gtk-web] download/linux: update to latest stable versions

[Sébastien Wilmet <swilmet src gnome org>]

commit 6469d9f0d0a8fee097b9d638cdfad960072b4d8a
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Oct 29 10:46:47 2017 +0100

    download/linux: update to latest stable versions

 download/linux.php |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/download/linux.php b/download/linux.php
index 4f94efc..b6428b3 100755
--- a/download/linux.php
+++ b/download/linux.php
@@ -5,12 +5,12 @@ ob_start();
 
 // Set the current stable version numbers of GTK+, GLib, and Pango to automatically include it in the page.
 $versions = array(
-       'gobject-introspection' => '1.52',
+       'gobject-introspection' => '1.54',
        'gtk' => '3.22',
-       'glib' => '2.52',
+       'glib' => '2.54',
        'pango' => '1.40',
        'gdk-pixbuf' => '2.36',
-       'atk' => '2.24'
+       'atk' => '2.26'
 );
 
 // Versions of GTK+ that are older, but still included on the page in the "Older Versions" section