[pygobject] Update NEWS and release PyGObject-2.21.3

[Tomeu Vizoso <tomeuv src gnome org>]

commit a7fa8b80406227a06cf18f8675dbc1f471283829
Author: Tomeu Vizoso <tomeu vizoso collabora co uk>
Date:   Mon Jun 21 18:10:32 2010 +0200

    Update NEWS and release PyGObject-2.21.3

 NEWS |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 13118e0..cee8732 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,10 @@
+2.21.3 21-Jan-2010
+        - Proper handling of null-ok in virtual methods (Ludovic L'Hours)
+        - Fall back to use the floating references API in glib if there isn't a sinkfunc defined. (Tomeu Vizoso)
+        - Revert "Drop sinkfuncs." (Tomeu Vizoso)
+        - [giounix] Make it possible to compile on glib 2.20 (Johan Dahlin)
+        - Release the lock when potentially invoking Python code. (Sjoerd Simons)
+
 2.21.2 10-Jan-2010
         - Drop sinkfuncs. (Tomeu Vizoso)
         - Clear error if we failed the import (Colin Walters)