chore: update CHANGELOG.md

Author: ttypic

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Change Log
 
+## [1.3.0](https://github.com/ably/ably-java/tree/v1.3.0)
+
+[Full Changelog](https://github.com/ably/ably-java/compare/v1.2.54...v1.3.0)
+
+This release introduces experimental support for LiveObjects, providing realtime, collaborative data structures that automatically synchronize state across all connected clients.
+
+**Implemented enhancements:**
+
+- Experimental support for LiveObjects has been added. **Note:** This feature is experimental and the API may change in future releases.
+
 ## [1.2.54](https://github.com/ably/ably-java/tree/v1.2.54)
 
 [Full Changelog](https://github.com/ably/ably-java/compare/v1.2.53...v1.2.54)