CHANGELOG in message_bus-2.2.1 vs CHANGELOG in message_bus-2.2.2

@@ -1,4 +1,12 @@
+Unreleased
+
+- Version 2.2.1
+
+  - FEATURE: Support rate limiting by server, 429 status codes are respected and we hold off as needed
+
+  - FIX: In the redis backend make the `is_readonly?` method compatible with the redis gem both pre and post v4.0 when the `client` attribute was removed
+
 30-04-2019
 
 - Version 2.2.1
 
   - FIX: No longer handles exceptions raised in downstream middleware via `on_middleware_error`