Re-establish Babl-1.0 dependency for the introspection
It looks like Gegl already includes Babl symbols in its .gir file so it might be the right time to revert 7dcbb732 and re-add the dependency to the .gir generation and .deps file
It looks like Gegl already includes Babl symbols in its .gir file so it might be the right time to revert 7dcbb732 and re-add the dependency to the .gir generation and .deps file