[package] Add analytics dependency to package.json. (#4794)

* [package] Add analytics dependency to package.json.

* update changelog.

* whitespace.

Co-authored-by: Chris Elion <chris.elion@unity3d.com>

Co-authored-by: Chris Elion <chris.elion@unity3d.com>

com.unity.ml-agents/CHANGELOG.md

 
 ### Bug Fixes
 #### com.unity.ml-agents (C#)
+- Add analytics package depedency to the package manifest. (#4794)
 #### ml-agents / ml-agents-envs / gym-unity (Python)
 
 

com.unity.ml-agents/package.json

     "com.unity.modules.imageconversion": "1.0.0",
     "com.unity.modules.jsonserialize": "1.0.0",
     "com.unity.modules.physics": "1.0.0",
-    "com.unity.modules.physics2d": "1.0.0"
+    "com.unity.modules.physics2d": "1.0.0",
+    "com.unity.analytics": "1.0.0"
   }
 }