Fix lintian complaints

Benjamin Drungrequested to merge
bdrung/initramfs-tools:lintian into master
  • Update lintian override to format for lintian 2.116.3
  • Convert debian/copyright to machine-readable format
  • Switch to debhelper 13
  • Bump Standards-Version to 4.7.0
  • Drop Breaks/Conflicts that predate Debian 10 "buster" and Ubuntu 20.04 "focal"
Edited by Benjamin Drung

Merge request reports