xfce4-conf: update to 4.13.7
Change log:
4.13.7
======
- Bump glib version
- Bug #15122: xfconf: disable gsettings backend by default
- Fix compiler error -Wcast-function-type (GCC 8)
- Fix this use of "defined" may not be portable
- Update .gitignore
- Fix warnings reported by GCC 8 (Bug #15112)
- Added gdbus binding to gitignore, add post release git tag
- Translation updates: Basque, Belarusian, Bulgarian, Catalan, Czech, Danish,
English (Australia), Icelandic, Italian, Lithuanian, Portuguese (Brazilian),
Romanian, Slovak, Swedish
593040695f