Add changelog entry

jrbourbeau · jrbourbeau · commit 2f97c6d224c2 · 2021-10-12T15:20:53.000-05:00
diff --git a/CHANGES.md b/CHANGES.md
@@ -1,7 +1,9 @@
 2.1.0 (in development)
 ======================
 
-
+- Support for pickling `abc.abstractproperty`, `abc.abstractclassmethod`,
+  and `abc.abstractstaticmethod`.
+  ([PR #450](https://github.com/cloudpipe/cloudpickle/pull/450))
 
 2.0.0
 =====
