Update copyright.

debian/changelog

@@ -2,6 +2,7 @@ liblxqt (0.13.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
   * Update Vcs-* and Maintainer to Lubuntu values.
+  * Update copyright.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 21 May 2018 22:14:31 -0500
 

debian/copyright

@@ -3,10 +3,17 @@ Upstream-Name: liblxqt
 Source: https://github.com/lxqt/liblxqt
 
 Files: *
-Copyright: 2012-2017 LXQt team
+Copyright: 2012-2018 LXQt team
            2010-2012 Razor team
+           2012 Alec Moskvin <alecm@gmx.com>
+           2018 Luís Pereira <luis.artur.pereira@gmail.com>
 License: LGPL-2.1+
 
+Files: lxqtbacklight.*
+       lxqtbacklight/*
+Copyright: 2016, 2018 P.L. Lucas
+License: GPL-2+
+
 Files: debian/*
 Copyright: 2014-2018 Alf Gaida <agaida@siduction.org>
 License: LGPL-2.1+
@@ -24,3 +31,17 @@ License: LGPL-2.1+
  .
  On Debian systems, the complete text of the GNU Lesser General
  Public License version 2.1 can be found in "/usr/share/common-licenses/LGPL-2.1".
+
+License: GPL-2+
+ This program or library is free software; you can redistribute it
+ and/or modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+ .
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+ .
+ On Debian systems, the complete text of the GNU General Public
+ License version 2 can be found in "/usr/share/common-licenses/GPL-2".