Fix some issues reported by lintian

Fix some issues reported by lintian

• Bump debhelper from old 12 to 13. (package-uses-old-debhelper-compat-version)

• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-file)

• Drop transition for old debug package migration. (debug-symbol-migration-possibly-complete)

• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created automatically by the Janitor bot. For more information, including instructions on how to disable these merge proposals, see https://janitor.debian.net/lintian-fixes.

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The bot will automatically update the merge proposal to resolve merge conflicts or close the merge proposal when all changes are applied through other means (e.g. cherry-picks). Updates may take several hours to propagate.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/meritous/671991f0-14c5-4b5d-9a0b-792d96e521ff.

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 set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/b1/d1eb6c09e0d6a0de6acac08d71bd0c5d8bc95d.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/23/f3447957006fd5e4dc7635ac0cd7f5253c630a.debug

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

No differences were encountered between the control files of package **meritous-data**

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

• Breaks: meritous-dbg (<< 1.4-2~)
• Build-Ids: 23f3447957006fd5e4dc7635ac0cd7f5253c630a b1d1eb6c09e0d6a0de6acac08d71bd0c5d8bc95d
• Replaces: meritous-dbg (<< 1.4-2~)

You can also view the diffoscope diff (unfiltered).