[gobject-introspection] Update NEWS

[Christoph Reiter <creiter src gnome org>]

commit e7dd95f4ea463fe355e12962c727eebffc913b92
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Sun Dec 30 14:15:18 2018 +0100

    Update NEWS

 NEWS | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/NEWS b/NEWS
index f5d44d56..4c0b04e2 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,15 @@
+1.58.3 - 2018-12-30
+-------------------
+
+* docwriter: Support python-markdown 3.x
+  :issue:`250`
+* scanner:  Define grefcount and gatomicrefcount as aliases to gint
+  :issue:`254` (:user:`Tomasz Miąsko <tmiasko>`)
+* scanner: make using bool without stdbool include work again
+  :issue:`247`
+* gir: Update glib annotations for glib 2.58.2
+
+
 1.59.1 - 2018-12-16
 -------------------