Bump version for development to 0.5.2 (hopefully 0.6)
Bump version for development to 0.5.2 (hopefully 0.6)

nzjrs/pygobject,choeger/pygobject-cmake,MathieuDuponchelle/pygobject,Distrotech/pygobject,sfeltman/pygobject,davibe/pygobject,thiblahute/pygobject,jdahlin/pygobject,thiblahute/pygobject,jdahlin/pygobject,nzjrs/pygobject,nzjrs/pygobject,Distrotech/pygobject,davidmalcolm/pygobject,alexef/pygobject,choeger/pygobject-cmake,davibe/pygobject,GNOME/pygobject,thiblahute/pygobject,sfeltman/pygobject,pexip/pygobject,alexef/pygobject,choeger/pygobject-cmake,MathieuDuponchelle/pygobject,jdahlin/pygobject,GNOME/pygobject,davidmalcolm/pygobject,davibe/pygobject,davibe/pygobject,MathieuDuponchelle/pygobject,alexef/pygobject,Distrotech/pygobject,pexip/pygobject,pexip/pygobject,sfeltman/pygobject,davidmalcolm/pygobject,Distrotech/pygobject,GNOME/pygobject