TT#124273 Update packaging for bullseye

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

Change-Id: I3f3f6040df09dfd353d06a63143f3b98bac1e5df

debian/control

@@ -3,13 +3,13 @@ Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
 Homepage: https://www.sipwise.com/
 Build-Depends:
- debhelper-compat (= 12),
+ debhelper-compat (= 13),
  libldap2-dev,
  libpq-dev,
  libsasl2-dev,
  python3-dev,
  virtualenv,
-Standards-Version: 3.9.8
+Standards-Version: 4.5.1
 Section: python
 
 Package: repoapi

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Name: repoapi
 
 Files: *
 Copyright:
- Copyright © 2015-2019 Sipwise GmbH, Austria
+ Copyright © 2015-2021 Sipwise GmbH, Austria
 License: GPL-3.0+
  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