[gtk/wip/jimmac/icon-dropshadows: 3/13] Update GDK_OSX versions to current MacOS release.

[Jakub Steiner <jimmac src gnome org>]

commit 6a7534345f967e550e674f6e24d534e1fff26340
Author: John Ralls <jralls ceridwen us>
Date:   Mon Oct 15 10:41:15 2018 -0700

    Update GDK_OSX versions to current MacOS release.

 gdk/quartz/gdkquartz.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gdk/quartz/gdkquartz.h b/gdk/quartz/gdkquartz.h
index 24555d4a40..ed8e4cb8b1 100644
--- a/gdk/quartz/gdkquartz.h
+++ b/gdk/quartz/gdkquartz.h
@@ -53,7 +53,9 @@ typedef enum
   GDK_OSX_YOSEMITE = 10,
   GDK_OSX_EL_CAPITAN = 11,
   GDK_OSX_SIERRA = 12,
-  GDK_OSX_CURRENT = 12,
+  GDK_OSX_HIGH_SIERRA = 13,
+  GDK_OSX_MOJAVE = 14,
+  GDK_OSX_CURRENT = 14,
   GDK_OSX_NEW = 99
 } GdkOSXVersion;