TT#124273 Update packaging for bullseye

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

Change-Id: I1a5c8670159b4048d87fcbf1b6589200e7fe0db6

debian/control

@@ -3,8 +3,8 @@ Section: net
 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-dhtest

debian/copyright

@@ -6,7 +6,7 @@ Copyright:
  Copyright © 2013 Alan T. DeKok <aland@freeradius.org>
  Copyright © 2013 blueardour <blueardour@gmail.com>
  Copyright © 2013 Neuton Martins Costa <notuenmc@gmail.com>
- Copyright © 2013-2015, 2017-2019 Sipwise GmbH, Austria
+ Copyright © 2013-2015, 2017-2021 Sipwise GmbH, Austria
 License: GPL-2
 
 License: GPL-2