Fix some issues reported by lintian

Fix some issues reported by lintian

• Update watch file format version to 4. (older-debian-watch-file-standard)

• Bump debhelper from old 10 to 13. (package-uses-old-debhelper-compat-version)

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

• Update Vcs-* headers from URL redirect. (vcs-obsolete-in-debian-infrastructure)

• Use canonical URL in Vcs-Git. (vcs-field-not-canonical)

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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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/tasksh/621ba5cf-71ca-4df3-8406-511dbcc7be28.

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/71/c6481b046f9c9f4eb1dd7056a3e3de23a2c1c4.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/fd/458c6ac8b84bcc12d5ca4b745b23d1528b4449.debug

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

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

• Build-Ids: fd458c6ac8b84bcc12d5ca4b745b23d1528b4449 71c6481b046f9c9f4eb1dd7056a3e3de23a2c1c4

You can also view the diffoscope diff (unfiltered).