[gtksourceview] Release 3.99.7

[Sébastien Wilmet <swilmet src gnome org>]

commit 7c3d5ea470399f8e64f0f6d3c71923205fae1529
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Dec 9 13:07:31 2017 +0100

    Release 3.99.7

 NEWS |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index d99c375..d10753d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,14 @@
+News in 3.99.7, 2017-12-09
+--------------------------
+* Rename gtk_source_completion_show() to gtk_source_completion_start().
+* Drop gconstructor.h, add gtk_source_init() and gtk_source_finalize().
+* Improve documentation.
+* New syntax highlighting definition file for: logcat.
+* Improvements to the syntax highlighting of: Python, reStructuredText and
+  CMake.
+* Improvements to the Visual Studio builds.
+* Translation updates.
+
 News in 3.99.6, 2017-10-15
 --------------------------
 * Reduce a lot the number of translatable strings (especially in *.lang files),