Version bump to start work on 2.3

CHANGELOG.txt

@@ -1,6 +1,10 @@
 Changelog
 =========
 
+2.3 (xx.xx.xxxx) - IN DEVELOPMENT
+~~~~~~~~~~~~~~~~
+
+
 2.2 (xx.xx.xxx) - IN DEVELOPMENT
 ~~~~~~~~~~~~~~~
 

docs/releases/2.3.rst

@@ -0,0 +1,20 @@
+==========================================
+Wagtail 2.3 release notes - IN DEVELOPMENT
+==========================================
+
+.. contents::
+    :local:
+    :depth: 1
+
+
+What's new
+==========
+
+Other features
+~~~~~~~~~~~~~~
+
+Bug fixes
+~~~~~~~~~
+
+Upgrade considerations
+======================

docs/releases/index.rst

@@ -5,6 +5,7 @@ Release notes
    :maxdepth: 1
 
    upgrading
+   2.3
    2.2
    2.1.1
    2.1

wagtail/__init__.py

@@ -2,7 +2,7 @@ from wagtail.utils.version import get_semver_version, get_version
 
 # major.minor.patch.release.number
 # release must be one of alpha, beta, rc, or final
-VERSION = (2, 2, 0, 'rc', 1)
+VERSION = (2, 3, 0, 'alpha', 0)
 
 __version__ = get_version(VERSION)
 

wagtail/project_template/requirements.txt

@@ -1,2 +1,2 @@
 Django>=2.0,<2.1
-wagtail==2.2rc1
+wagtail==2.3a0