MAINT: bump version to 2.3.1

Author: jakevdp

CHANGES.md

@@ -1,15 +1,15 @@
 # Altair Change Log
 
-## Version 2.4.0 (Unreleased)
+## Version 2.3.1 (Released February 21, 2019)
 
 ### Enhancements
 
-### Backward-incompatible Changes
-
-### Maintenance
+- Several documentation cleanups & new examples
 
 ### Bug Fixes
 
+- Fix incompatibility with pandas version 0.24 (#1315)
+
 ## Version 2.3.0 (Released December 7, 2018)
 
 Includes many reworked examples in the example gallery.

altair/__init__.py

@@ -1,5 +1,5 @@
 # flake8: noqa
-__version__ = '2.4.0dev0'
+__version__ = '2.4.1'
 
 from .vegalite import *
 from . import examples

doc/conf.py

@@ -74,9 +74,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '2.4.0dev0'
+version = '2.4.1'
 # The full version, including alpha/beta/rc tags.
-release = '2.4.0dev0'
+release = '2.4.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.