Require lightdm 1.30.0 (#837)

Author: lenemter

debian/control

@@ -5,13 +5,12 @@ Maintainer: elementary, Inc. <builds@elementary.io>
 Build-Depends: debhelper (>= 10.5.1),
                desktop-file-utils,
                gettext,
-               libaccountsservice-dev,
                libgdk-pixbuf2.0-dev,
                libgnome-desktop-3-dev,
                libgranite-dev,
                libgtk-3-dev,
                libhandy-1-dev,
-               liblightdm-gobject-1-dev (>= 1.2.1),
+               liblightdm-gobject-1-dev (>= 1.30.0),
                libmutter-14-dev | libmutter-13-dev | libmutter-12-dev | libmutter-11-dev | libmutter-10-dev,
                libx11-dev,
                meson,