[librsvg/librsvg-2.48] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit 1e9270ae5a90956f61f81064c87316830d89434f
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Apr 23 12:02:36 2020 -0500

    Update NEWS

 NEWS | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/NEWS b/NEWS
index c0a99d7e..b09e5adf 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+Version 2.48.4
+
+- #590 - Fix regression when rendering masks.
+
+- #588 - Fix panic when a big viewBox creates an invalid transform.
+
+- #592 - Fix invalid argument to g_log_structured_array()
+
 Version 2.48.3
 
 - Librsvg now requires glib 2.50.0 or later.