TT#124273 Update packaging for bullseye

- Switch to debhelper compat level 13.
- Switch to Standards-Version 4.5.1.
- Update copyright years.

Change-Id: Id482a1764808c7ea89039d85c94d04a619c5bf49

debian/control

@@ -3,12 +3,12 @@ Section: perl
 Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Build-Depends:
- debhelper-compat (= 12),
+ debhelper-compat (= 13),
  libipc-system-simple-perl,
  libmodule-build-perl,
  libstrictures-perl,
  libtrycatch-perl,
-Standards-Version: 3.9.8
+Standards-Version: 4.5.1
 Homepage: https://www.sipwise.com/
 
 Package: libsipwise-base-perl

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Contact: Sipwise Development Team <support@sipwise.com>
 
 Files: *
 Copyright:
- Copyright © 2013-2019 Sipwise GmbH, Austria
+ Copyright © 2013-2021 Sipwise GmbH, Austria
 License: GPL-3+
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by