Post-release version bump for 0.5.5
Post-release version bump for 0.5.5

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