[gobject-introspection] Created tag 1.58.3

[Christoph Reiter <creiter src gnome org>]

The signed tag '1.58.3' was created.

Tagger: Christoph Reiter <reiter christoph gmail com>
Date: 1546175242 +0100

    release 1.58.3

Changes since the last tag '1.58.2':

Christoph Reiter (6):
      version bump
      ci: update the docker image
      docwriter: Support markdown 3.x. Fixes #250
      Update glib annotations (glib-2-58)
      scanner: make using bool without stdbool include work again. Fixes #247
      release

Tomasz Miąsko (1):
      Define grefcount and gatomicrefcount as aliases to gint