Switching to 0.3.0-preview.2

Author: JonathanHUnity

com.unity.perception/package.json

@@ -10,5 +10,5 @@
     "displayName": "Perception", 
     "name": "com.unity.perception", 
     "unity": "2019.3", 
-    "version": "0.3.0-preview.1"
+    "version": "0.3.0-preview.2"
 }