Fix some issues reported by lintian

Fix some issues reported by lintian

• Bump debhelper from old 10 to 12. (package-uses-old-debhelper-compat-version)
• Set upstream metadata fields: Bug-Submit (from ./configure). (upstream-metadata-file-is-missing)
• 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 (out-of-date-standards-version)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/xfce4-notifyd/7d3e3f48-0dd9-4552-afa9-e6a2b6d4b3f6.

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/7a/292a87293db7d73fbb8729ecdbb76715906b6c.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/c3/99064439f5ab349a13dd0d12160a45c87e6b29.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/d1/8823fba92b7f76660f193f3b0a949df0f0e6a6.debug
-rw-r--r--  root/root   /usr/lib/debug/.dwz/x86_64-linux-gnu/xfce4-notifyd.debug

Files in first .changes but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/03/e70a522bbdb8d9910dc3d57e6a65db61befcce.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/2c/ce97dbece6a1746bf9b4e1a638fbf091894ec5.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/cf/7ebbc36f150babf450fbd692c6dda7a9ba0a3a.debug

No differences were encountered between the control files of package **xfce4-notifyd**

Control files of package xfce4-notifyd-dbgsym: lines which differ (wdiff format)

• Build-Ids: 03e70a522bbdb8d9910dc3d57e6a65db61befcce 2cce97dbece6a1746bf9b4e1a638fbf091894ec5 cf7ebbc36f150babf450fbd692c6dda7a9ba0a3a 7a292a87293db7d73fbb8729ecdbb76715906b6c c399064439f5ab349a13dd0d12160a45c87e6b29 d18823fba92b7f76660f193f3b0a949df0f0e6a6

You can also view the diffoscope diff (unfiltered).