[gtk] (6 commits) Non-fast-forward update to branch cups-deprecation-warnings

[Marek Kašík <mkasik src gnome org>]

The branch 'cups-deprecation-warnings' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  42e1d16... Detect CUPS ≥ 1.7
  a97788c... cups: Use non-deprecated API
  5d7d2e7... Require CUPS >= 2.0

Commits added to the branch:

  730b52b... testsuite: Add blur node testcase (*)
  b3c4320... node editor: Do some simple syntax highlighting (*)
  e847c03... gl renderer: Fix blur nodes with radius 0 (*)
  feddf5a... Detect CUPS ≥ 1.7
  ed31ea3... cups: Use non-deprecated API
  3377133... Require CUPS >= 2.0

(*) This commit already existed in another branch; no separate mail sent