chore: update CHANGELOG.md

Author: xsahil03x

packages/stream_core/CHANGELOG.md

@@ -1,3 +1,20 @@
+## Unreleased
+
+### 💥 BREAKING CHANGES
+
+- Renamed `AppLifecycleStateProvider` to `LifecycleStateProvider` and `AppLifecycleState` to `LifecycleState`
+
+### ✨ Features
+
+- Added `keepConnectionAliveInBackground` option to `ConnectionRecoveryHandler`
+- Added `unknown` state to `NetworkState` and `LifecycleState` enums
+
+### 🐛 Bug Fixes
+
+- Fixed `onClose()` not being called when disconnecting during connecting state
+- Fixed unnecessary reconnection attempts when network is offline
+- Fixed existing connections not being closed before opening new ones
+
 ## 0.1.0
 
-* Initial release
+- Initial release