Fix some issues reported by lintian

Fix some issues reported by lintian

• Bump debhelper from old 11 to 13. (package-uses-old-debhelper-compat-version)

• Set upstream metadata fields: Repository. (upstream-metadata-file-is-missing)

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/pd-iemambi/b983e2a0-e1dc-457b-9f65-804f86e9b4dc.

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/6e/b5d9445a9580e366de95f2b69453a2055da332.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/ec/a8370ebf0cde52e84a9c71334bd6875667f240.debug

No differences were encountered between the control files of package **pd-iemambi**

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

• Build-Ids: eca8370ebf0cde52e84a9c71334bd6875667f240 6eb5d9445a9580e366de95f2b69453a2055da332

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