[gtksourceview] Release 4.0.0

[Sébastien Wilmet <swilmet src gnome org>]

commit 95be808cab52c8ae9dbf0a4a64a80d1b3cb2e00d
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Mar 10 11:15:59 2018 +0100

    Release 4.0.0

 NEWS         |    9 +++++++++
 README       |    2 +-
 configure.ac |    6 +++---
 3 files changed, 13 insertions(+), 4 deletions(-)
---
diff --git a/NEWS b/NEWS
index d10753d..4cfbe9e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+News in 4.0.0, 2018-03-10
+-------------------------
+* GtkSourceView class: respect the GtkTextView:accepts-tab property.
+* New syntax highlighting definition file for: Groovy and Tera templates.
+* Improvements to the syntax highlighting of: Erlang and Fortran.
+* Provide an Uncrustify configuration file for the GtkSourceView C coding style.
+* Various other improvements and small fixes.
+* Translation updates.
+
 News in 3.99.7, 2017-12-09
 --------------------------
 * Rename gtk_source_completion_show() to gtk_source_completion_start().
diff --git a/README b/README
index 0ac3b64..4029b1e 100644
--- a/README
+++ b/README
@@ -1,7 +1,7 @@
 GtkSourceView
 =============
 
-This is version 3.99.8 of GtkSourceView.
+This is version 4.0.0 of GtkSourceView.
 
 GtkSourceView is a GNOME library that extends GtkTextView, the standard GTK+
 widget for multiline text editing. GtkSourceView adds support for syntax
diff --git a/configure.ac b/configure.ac
index 9847853..72adc03 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,9 +2,9 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.64)
 
-m4_define(gtksourceview_major_version, 3)
-m4_define(gtksourceview_minor_version, 99)
-m4_define(gtksourceview_micro_version, 8)
+m4_define(gtksourceview_major_version, 4)
+m4_define(gtksourceview_minor_version, 0)
+m4_define(gtksourceview_micro_version, 0)
 m4_define(gtksourceview_version, 
gtksourceview_major_version.gtksourceview_minor_version.gtksourceview_micro_version)
 
 AC_INIT([gtksourceview],