fix missing metafile (#3999)

* add missing metafile, change package to 1.0.2

* changelog

* undo DevProject

com.unity.ml-agents/CHANGELOG.md

 and this project adheres to
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.0.2-preview] - 2020-05-19
+### Bug Fixes
+#### com.unity.ml-agents (C#)
+- Fix missing .meta file
+
 ## [1.0.1-preview] - 2020-05-19
 ### Bug Fixes
 #### com.unity.ml-agents (C#)

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 = "1.0.1-preview";
+        internal const string k_PackageVersion = "1.0.2-preview";
 
         const int k_EditorTrainingPort = 5004;
 

com.unity.ml-agents/package.json

 {
   "name": "com.unity.ml-agents",
   "displayName": "ML Agents",
-  "version": "1.0.1-preview",
+  "version": "1.0.2-preview",
-}
+}

com.unity.ml-agents/Tests/Editor/Communicator/GrpcExtensionsTests.cs.meta

+fileFormatVersion: 2
+guid: 7aa28d0e370064c18bb8a913417ad21d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: