Fix some issues reported by lintian

Fix some issues reported by lintian

• Use secure copyright file specification URI. (insecure-copyright-format-uri)
• Bump debhelper from old 11 to 12. (package-uses-old-debhelper-compat-version)
• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-file)
• Set field Upstream-Contact in debian/copyright.
• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository.
• Remove obsolete fields Contact, Name from debian/upstream/metadata (already present in machine-readable debian/copyright).

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/neat/990c46d0-632e-41f8-ad47-497376443418.

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/15/977a2d385bb01b69bdb48171922600bc62b3fb.debug
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc6543_3cols.dat
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc6543_4cols.dat
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc7009_all.dat
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc7009_cels.dat

Files in first .changes but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/52/861e8278b3422efb41fadedb5dabdac2a1d047.debug
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc6543_3cols.dat.gz
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc6543_4cols.dat.gz
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc7009_all.dat.gz
-rw-r--r--  root/root   /usr/share/doc/neat/examples/ngc7009_cels.dat.gz

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

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

• Build-Ids: 52861e8278b3422efb41fadedb5dabdac2a1d047 15977a2d385bb01b69bdb48171922600bc62b3fb

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