[librsvg/librsvg-2.48] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit ecb4e8cf1dc00f1b2a95cf812f0051f01cac8b8d
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Feb 21 15:09:54 2020 -0600

    Update NEWS

 NEWS | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/NEWS b/NEWS
index 72046788..db22fc09 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,11 @@ Version 2.47.4
 - (#547) - Do not stop rendering if an <image> element references a
   nonexistent file.  This fixes a number of Open Clipart cases.
 
+- (#558) - Compute the font-size cascade correctly when there are "em"
+   #and "ex" units involved.
+
+- Updated the man page for rsvg-convert (Sven Neumann).
+
 Version 2.47.3
 
 - #379 - New API, rsvg_handle_set_stylesheet(), to set a CSS