[dconf] Created tag 0.40.0

[Daniel Playfair Cal <danielplayfaircal src gnome org>]

The signed tag '0.40.0' was created.

Tagger: Daniel Playfair Cal <daniel playfair cal gmail com>
Date: 1615597208 +1100

    DConf 0.40.0

Changes since the last tag '0.39.1':

Christian Persch (1):
      common: Add missing G_BEGIN/END_DECLS

Daniel Playfair Cal (4):
      build: increment version following 0.39.1 release
      Merge branch 'increment/0.39.2' into 'master'
      build: update NEWS and version for 0.40.0
      Merge branch 'version/0.40.0' into 'master'

Philip Withnall (1):
      Merge branch 'wip/issue-23' into 'master'