[gtksourceview] (3 commits) Non-fast-forward update to branch wip/chergert/snippets

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/snippets' 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:

  550e8ac... doc: update HACKING for ownership transfer
  b21b491... snippet: implement basic snippet system
  d260467... version: use 4.90 for 5.0 version numbers

Commits added to the branch:

  7035d3e... doc: update HACKING for ownership transfer (*)
  43388a7... version: use 4.90 for 5.0 version numbers (*)
  6ca6e23... snippet: implement basic snippet system

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