chore: update CHANGELOG for 2.2.1

Marcy Sutton · Marcy Sutton · commit 01ec7d199ffb · 2017-05-19T14:06:50.000-07:00
diff --git a/CHANGELOG b/CHANGELOG
@@ -74,3 +74,7 @@ v2.2.0:
 		- Implement rule groupings as tags
 		- Allow building of axe in multiple languages
 		- Empty-heading rule has impact: moderate
+v2.2.1:
+	date: 2017-05-19
+	changes:
+		- Remove nodes from the color contrast incompleteData API to avoid circular references
