Set version to 4.9.0

Author: niwinz

CHANGES.txt

@@ -1,8 +1,10 @@
 Changelog
 =========
 
-UNRELEASED
-----------
+Version 4.9.0
+-------------
+
+Date: 2018-03-01
 
 - Add testing and support for Django 2.0. No actual code changes were required.
 - Escape `KEY_PREFIX` and `VERSION` when used in glob expressions.
@@ -15,6 +17,7 @@ UNRELEASED
 - Fix `add()` with a negative timeout to not store key (it is immediately
   invalid).
 - Remove support for Django < 1.11.
+- Add support for atomic incr if key is not set.
 
 
 Version 4.8.0

django_redis/__init__.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-VERSION = (4, 8, 0)
+VERSION = (4, 9, 0)
 __version__ = '.'.join(map(str, VERSION))