[pygobject] release 3.21.0

[Simon Feltman <sfeltman src gnome org>]

commit febd211b6628a8f63d92ae011d68b845e9fe6ec8
Author: Simon Feltman <sfeltman src gnome org>
Date:   Sun Apr 24 21:19:39 2016 -0700

    release 3.21.0

 NEWS |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index b6be34e..c3cf4e0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,10 @@
+3.21.0  24-Apr-2016
+        - gi: Add require_versions() function (Dustin Falgout) (#761141)
+        - test_gerror_novalue: Don't assign the error to a variable
+          (Iain Lane) (#764165)
+        - build: Do not enable code coverage based on lcov
+          (Emmanuele Bassi) (#764075)
+
 3.20.0  21-Mar-2016
 
 3.19.92 15-Mar-2016