[packagekit] PackageKit dependencies

[Justin Haygood]

I'm working on a new backend (zypp) for PackageKit.. and while building
it, I noticed that it compiles fine on slightly lower versions of
dependencies (basically.. what OpenSUSE 10.3 beta 2 ships with)

Glib 2.13.7 (vs Glib 2.14.. Glib 2.13 is prerelease 2.14, correct?)
Dbus 1.0 (vs Dbus 1.1)
PolicyKit 0.4 (vs PolicyKit 0.5)

Is there any reason why it'd need the newer versions?