* configure.ac:
* meson.build: Require glib-2.0 >= 2.79.2.
* gio/src/application.hg: Add get/set/property_version().
* gio/src/applicationcommandline.[ccg|hg]: Add done().
Use g_application_command_line_print/printerr_literal() in print/printerr().
* gio/src/dbusmessage.hg: Add get_arg0_path().
* gio/src/socket.hg: Add receive_bytes() and receive_bytes_from().
* glib/glibmm/utility.h: Add convert_const_gchar_ptr_to_dbus_object_path_string().
* glib/src/datetime.hg: Add create_from_local_usec(), create_from_utc_usec()
and to_unix_usec().
* tools/m4/convert_glib.m4: Add conversion for Glib::DBusObjectPathString.