Updating changelog

com.unity.perception/CHANGELOG.md

 ### Added
 Added new randomization tools
 
+Added support for 2020.1
+
-Changed default labeler ids to be lower-case to be consistent with the ids in the dataset.
+Changed default labeler ids to be lower-case to be consistent with the ids in the dataset
+
+Switched to latest versions of com.unity.simulation.core and com.unity.simulation.capture
 
 ### Deprecated