[gtksourceview] Release 3.21.3

[Sébastien Wilmet <swilmet src gnome org>]

commit ab00e0e44c5530bfef7ca11124d5fc27739add86
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Jul 17 14:19:18 2016 +0200

    Release 3.21.3

 NEWS |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 4e7f441..f4c2f4e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,19 @@
+News in 3.21.3
+--------------
+* Warn when a secondary public header is #included in external code.
+  Only <gtksourceview/gtksource.h> should be #included directly.
+* Remove the --disable-completion-providers configure option, to always build
+  the completion providers. There is currently only one completion provider:
+  GtkSourceCompletionWords, which is not a lot of code and doesn't pull up
+  additional dependencies.
+* Add back the gtksourceview-typebuiltins.h public header, for backward
+  compatibility.
+* Fixes/improvements to the Visual Studio builds
+* Improvements to the syntax highlighting of: rpmspec
+* Fix a bug in GtkSourceSearchContext
+* Various small code and documentation improvements
+* Translation updates
+
 News in 3.21.2
 --------------
 * Make gtk_source_style_apply() public