[geary] Non-fast-forward update to branch mjog/port-to-libhandy-1

[Michael Gratton <mjog src gnome org>]

The branch 'mjog/port-to-libhandy-1' 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:

  59429aa... build: Remove libhandy from CI prereqs until >= 0.91 is pac

Commits added to the branch:

  6baa76f... build: Remove libhandy from CI prereqs until >= 0.91 is pac