TT#124273 Update packaging for bullseye

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

Change-Id: I1864dd10a6d718079ed8743f79526c9734a8d1c2

debian/control

@@ -3,8 +3,8 @@ Section: comm
 Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Build-Depends:
- debhelper-compat (= 12),
-Standards-Version: 3.9.8
+ debhelper-compat (= 13),
+Standards-Version: 4.5.1
 Homepage: https://www.sipwise.com/
 
 Package: ngcp-vmnotify

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Contact: Sipwise Development Team <support@sipwise.com>
 
 Files: *
 Copyright:
- Copyright © 2007-2019 Sipwise GmbH, Austria
+ Copyright © 2007-2021 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