Bug#950453: Mark debhelper compatibility level 9 as deprecated

["Chris Lamb" <lamby@debian.org>]

Source: lintian
Version: 2.48.0
Severity: normal

[…]

 * Compatibility level 9 is hereby officially deprecated and will
   trigger deprecation warnings soon.  We recommend people migrate
   their packages to compat 12 or 10 depending on whether oldstable
   support is needed.  Please note that compat 11 is actively
   discouraged in some cases. (see the section above).

[…]


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby@debian.org 🍥 chris-lamb.co.uk
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