update changelog

Signed-off-by: Matthias Wahl <mwahl@wayfair.com>

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## Unreleased
+
+
+### Fixes
+
+* Fix `kafka` onramp hanging with no message in the queue, leading to delayed offset commits [#779](https://github.com/tremor-rs/tremor-runtime/pull/779)
+* Fail the `kafka` onramp if any of the configured topics could not be subscribed to [#779](https://github.com/tremor-rs/tremor-runtime/pull/779)
+
+### New features
+
+* Add the `cb` offramp for testing upstream circuit breaker behaviour [#779](https://github.com/tremor-rs/tremor-runtime/pull/779)
+* Add the `kafka` onramp config `retry_failed_events` to acoid retrying failed events, and `polling_interval` to control how often kafka is polled for new messages if none were available previously [#779](https://github.com/tremor-rs/tremor-runtime/pull/779)
 ## 0.10.2
 
 ### Fixes