Update CHANGELOG.md (#255)

Author: LaurieCheers-unity

com.unity.robotics.ros-tcp-connector/CHANGELOG.md

@@ -14,8 +14,26 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 Added Sonarqube scanner
 
+Added more tests
+
+Add support for cloud rendering
+
+Added MessagePool<T> to enable message reuse and reduce garbage collection
+
+Can configure what direction is "north" for NED and ENU coordinates
+
 ### Changed
 
+CameraInfo.msg field names are different in ROS2
+
+Bug fix - cope with tab character in a .msg file
+
+Bug fix - no padding when serializing an empty array
+
+Can publish messages from threads other than main
+
+Visualizations work with ROS services
+
 ### Deprecated
 
 ### Removed