Fix some issues reported by lintian

Fix some issues reported by lintian

• Bump debhelper from old 11 to 12. (package-uses-old-debhelper-compat-version)
• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-file)
• Update standards version to 4.4.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created automatically by the Janitor bot.

You can follow up to this merge proposal as you normally would.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/kookbook/d6ef5df8-2533-45fd-983a-e0425ef218f4.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second .changes but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/71/8738793c7d4bfea65fe8d18b09913e3616de41.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/c4/4318b45993ca6ae152f0629419483648addf15.debug
-rw-r--r--  root/root   /usr/lib/debug/.dwz/x86_64-linux-gnu/kookbook.debug

Files in first .changes but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/00/343f072a231a18970eac25043e097dd83b27f5.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/96/1c1bd4b27191e28a6a97227cb014fd4194771a.debug

No differences were encountered between the control files of package **kookbook**

Control files of package kookbook-dbgsym: lines which differ (wdiff format)

• Build-Ids: 00343f072a231a18970eac25043e097dd83b27f5 961c1bd4b27191e28a6a97227cb014fd4194771a 718738793c7d4bfea65fe8d18b09913e3616de41 c44318b45993ca6ae152f0629419483648addf15

You can also view the diffoscope diff (unfiltered).