Free the root node obtained using json_parser_get_root()
Free the root node obtained using json_parser_get_root()

Update json_construct_gobject() to the change of behaviour in the
root node getter function of JsonParser.

brauliobo/json-glib,ebassi/json-glib,ebassi/json-glib,GNOME/json-glib,frida/json-glib,brauliobo/json-glib,ebassi/json-glib,robtaylor/json-glib-gvariant,robtaylor/json-glib-gvariant,oerdnj/json-glib,oerdnj/json-glib,brauliobo/json-glib,Distrotech/json-glib,frida/json-glib,oerdnj/json-glib,Distrotech/json-glib,GNOME/json-glib,oerdnj/json-glib,Distrotech/json-glib