TT#124273 Update packaging for bullseye

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

Change-Id: I63e9d38216f13ca4f65c30483ec27a4591cce9cf

debian/control

@@ -3,9 +3,9 @@ Section: net
 Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Homepage: https://sipwise.com/
-Standards-Version: 3.9.8
+Standards-Version: 4.5.1
 Build-Depends:
- debhelper-compat (= 12),
+ debhelper-compat (= 13),
 
 Package: ngcp-pxe-boot-images
 Architecture: all

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Contact: Sipwise Development Team <support@sipwise.com>
 
 Files:
  debian/*
-Copyright: 2016-2019 Sipwise GmbH, Austria
+Copyright: 2016-2021 Sipwise GmbH, Austria
 License: GPL-2
 
 Files: