Bump version to 0.2.2.

Author: jeromekelleher

python/CHANGELOG.rst

@@ -1,12 +1,16 @@
 --------------------
-[0.2.2] - xxxx-xx-xx
+[0.2.2] - 2019-09-01
 --------------------
 
-In development.
+Minor bugfix release.
+
+Relaxes overly-strict input requirements on individual location data that
+caused some SLiM tree sequences to fail loading in version 0.2.1
+(see :issue:`351`).
 
 **New features**
 
-- Add log_time height scaling option for drawing SVG trees 
+- Add log_time height scaling option for drawing SVG trees
   (:user:`marianne-aspbury`). See :pr:`324` and :issue:`303`.
 
 **Bugfixes**

python/tskit/_version.py

@@ -1,3 +1,3 @@
 # Definitive location for the version number.
 # During development, should be x.y.z.devN
-tskit_version = "0.2.2.dev0"
+tskit_version = "0.2.2"