Vala: Fix usage of PeasObjectModule within Vala
Vala: Fix usage of PeasObjectModule within Vala

The registration methods were marked as (skip), so they weren't
introspected, resulting in Vala not being able to use them.

chergert/libpeas,GNOME/libpeas,chergert/libpeas,gregier/libpeas,GNOME/libpeas,chergert/libpeas,Distrotech/libpeas,gregier/libpeas,gregier/libpeas,gregier/libpeas,Distrotech/libpeas,Distrotech/libpeas