[gtksourceview] Release 3.21.1

[Paolo Borelli <pborelli src gnome org>]

commit 2cb72ea9c7d32b545860ac0e58a5cf9d8efc509b
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Apr 23 15:27:21 2016 +0200

    Release 3.21.1

 NEWS |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 01e330c..69e4b6c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+News in 3.21.1
+--------------
+* Export SourceRegion in the public API
+* Translation updates
+
+News in 3.20.2
+--------------
+* Drawing optimizations
+* Translation updates
+
 News in 3.20.1
 --------------
 * Improvements to style schemes