[librsvg] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit 7cd081d417d1f83fafaeaa49dfb9f1430d21c040
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Sep 2 15:16:15 2019 -0500

    Update NEWS

 NEWS | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/NEWS b/NEWS
index b8a6d8a9..ea7c28f6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+Version 2.45.92
+- #496 - Ensure all lengths and angles parse as finite numbers
+
+- #497 - Don't panic on paths with all-invalid commands
+
+- #500 - Added additional SVG blend-modes for the feBlend filter primitive (Andargor)
+
+- Some changes in the build structure to allow for faster builds.
+
 Version 2.45.91
 - The documentation has a new chapter, Recommendations for Applications.