Add entry to CHANGES.md

Author: ogrisel

CHANGES.md

@@ -1,3 +1,10 @@
+0.4.3
+=====
+
+- Fixed a regression: `AttributeError` when loading pickles that hold a
+  reference to a dynamically defined class from the `__main__` module.
+  ([issue #131]( https://github.com/cloudpipe/cloudpickle/issues/131)).
+
 0.4.2
 =====