Merge remote-tracking branch 'origin/barracuda-1.3.0' into develop-var-len-obs-feature

com.unity.ml-agents/CHANGELOG.md

   additional memory allocations. (#4887)
 - Added `ObservationWriter.AddList()` and deprecated `ObservationWriter.AddRange()`.
   `AddList()` is recommended, as it does not generate any additional memory allocations. (#4887)
+- The Barracuda dependency was upgraded to 1.3.0. (#4898)
 
 #### ml-agents / ml-agents-envs / gym-unity (Python)
 - Added a `--torch-device` commandline option to `mlagents-learn`, which sets the default

com.unity.ml-agents/package.json

   "unity": "2018.4",
   "description": "Use state-of-the-art machine learning to create intelligent character behaviors in any Unity environment (games, robotics, film, etc.).",
   "dependencies": {
-    "com.unity.barracuda": "1.2.1-preview",
+    "com.unity.barracuda": "1.3.0-preview",
     "com.unity.modules.imageconversion": "1.0.0",
     "com.unity.modules.jsonserialize": "1.0.0",
     "com.unity.modules.physics": "1.0.0",