[tepl] Release 4.0.0

[Sébastien Wilmet <swilmet src gnome org>]

commit 168197c10ce9aa13942f58e32c613ecd63f14897
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Apr 8 12:43:26 2018 +0200

    Release 4.0.0

 NEWS         | 6 ++++++
 README       | 4 ++--
 configure.ac | 4 ++--
 3 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/NEWS b/NEWS
index 1afb1c6..f64bb79 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+News in 4.0.0, 2018-04-08
+-------------------------
+- Project moved to GNOME GitLab.
+- Various small improvements.
+- Translation updates.
+
 News in 3.99.1, 2017-12-09
 --------------------------
 
diff --git a/README b/README
index 727ce8c..7661015 100644
--- a/README
+++ b/README
@@ -1,7 +1,7 @@
 Tepl - Text editor product line
 ===============================
 
-This is version 3.99.2 of Tepl.
+This is version 4.0.0 of Tepl.
 
 Tepl is a library that eases the development of GtkSourceView-based text
 editors and IDEs.
@@ -22,7 +22,7 @@ Dependencies
 
 - GLib >= 2.52
 - GTK+ >= 3.22
-- GtkSourceView >= 3.99.7
+- GtkSourceView >= 4.0
 - libxml2 >= 2.5
 - uchardet - https://www.freedesktop.org/wiki/Software/uchardet/
 
diff --git a/configure.ac b/configure.ac
index e2499cb..e7caa60 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.64)
 
 # Package version of the form 'major.minor.micro'.
-m4_define(tepl_package_version, 3.99.2)
+m4_define(tepl_package_version, 4.0.0)
 
 AC_INIT([tepl],
        [tepl_package_version],
@@ -58,7 +58,7 @@ AC_SUBST(TEPL_API_VERSION)
 # Dependencies
 glib_req=2.52
 gtk_req=3.22
-gtksourceview_req=3.99.7
+gtksourceview_req=4.0
 libxml_req=2.5
 
 AC_CONFIG_SRCDIR([tepl/tepl.h])