[shotwell] Created tag shotwell-0.30.7

[Jens Georg <jensgeorg src gnome org>]

The signed tag 'shotwell-0.30.7' was created.

Tagger: Jens Georg <mail jensge org>
Date: 1566329336 +0200

    Release 0.30.7

Changes since the last tag 'shotwell-0.30.6':

Jens Georg (5):
      vapi: Fix some issues with recent valas in internal libgdata copy
      Prevent compile issue with VALA < 0.40
      Make constructors of abstract classes protected
      Merge branch 'wip/stable/new-vala' into 'shotwell-0.30'
      Prepare 0.30.7

Rico Tzschichholz (1):
      Drop workaround for Markup.collect_attributes()