upgrade Barracuda to 1.0.3, set mlagents version to 1.0.5

com.unity.ml-agents/CHANGELOG.md

 and this project adheres to
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.0.5] - 2020-09-2
+### Minor Changes
+#### com.unity.ml-agents (C#)
+- Update Barracuda to 1.0.3. (#4506)
+
-### Bug Fixes
-#### com.unity.ml-agents (C#)
-#### ml-agents / ml-agents-envs / gym-unity (Python)
 
 ## [1.0.3] - 2020-07-07
 ### Minor Changes

com.unity.ml-agents/Runtime/Academy.cs

         /// Unity package version of com.unity.ml-agents.
         /// This must match the version string in package.json and is checked in a unit test.
         /// </summary>
-        internal const string k_PackageVersion = "1.0.4";
+        internal const string k_PackageVersion = "1.0.5";
 
         const int k_EditorTrainingPort = 5004;
 

com.unity.ml-agents/package.json

 {
   "name": "com.unity.ml-agents",
   "displayName": "ML Agents",
-  "version": "1.0.4",
+  "version": "1.0.5",
-    "com.unity.barracuda": "1.0.2",
+    "com.unity.barracuda": "1.0.3",
     "com.unity.modules.imageconversion": "1.0.0",
     "com.unity.modules.jsonserialize": "1.0.0",
     "com.unity.modules.physics": "1.0.0",