[geary] Created tag geary-0.12.3

[Michael Gratton <mjog src gnome org>]

The unsigned tag 'geary-0.12.3' was created.

Tagger: Michael James Gratton <mike vee net>
Date: 1531536112 +1000

    Tag for 0.12.3

Changes since the last tag 'geary-0.12.2':

Michael Gratton (3):
      Merge branch 'wip/gitlab-ci-0.12' into 'geary-0.12'
      Merge branch 'wip/gitlab-ci-0.12' into 'geary-0.12'
      Merge branch 'wip/11-special-folder-children-0.12' into 'geary-0.12'

Michael James Gratton (9):
      Fix a crash saving an attachment with unknown content type.
      Fix crash if the login session's secret service has no password keyring.
      Fix ContentTypeTest.guess_type_from_buf occasionally failing.
      Revert "Remove a number of redundant fns in Engine.Util.Ascii."
      Fix test build compiling with older valac.
      Intial GitLab CI for Geary 0.12.
      Ensure a folder's sidebar children are re-added when its type changes.
      Build CI Flatpak against 3.28 image.
      Update files for 0.12.3.

nick richards (1):
      Add OARS metadata