[gtksourceview] (6 commits) Non-fast-forward update to branch wip/encodings

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/encodings' 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:

  f68b8d6... Add gtk_source_encoding_remove_duplicates()
  62aa061... Ensure that UTF-8 and CURRENT are present in the candidate 

Commits added to the branch:

  cb87436... Release 3.13.3 (*)
  350bebf... Post release version bump (*)
  9a6ed08... encoding: remove unused function (*)
  9dc8a15... encoding: make a private function static (*)
  830d9dc... encoding: add private function remove_duplicates()
  68a073e... Ensure that UTF-8 and CURRENT are present in the candidate 

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