Fix some issues reported by lintian

Fix some issues reported by lintian

• Trim trailing whitespace. (trailing-whitespace)
• Bump debhelper from old 11 to 13. (package-uses-old-debhelper-compat-version)
• Set upstream metadata fields: Archive, Contact, Name. (upstream-metadata-file-is-missing)

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/10/e14b365c668390050df5ac8e47f8bdb4c37366.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/93/3d8e81fe075c9f28041b733880a82bfef2dc11.debug

No differences were encountered between the control files of package **r-cran-tkrplot**

Control files of package r-cran-tkrplot-dbgsym: lines which differ (wdiff format)

• Build-Ids: 933d8e81fe075c9f28041b733880a82bfef2dc11 10e14b365c668390050df5ac8e47f8bdb4c37366

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/tkrplot/09bee00b-e5da-4f92-a293-ff73de7881e9.