v1.5.0-beta5 -> v.1.5.0-beta6

package.json

@@ -1,13 +1,13 @@
 {
   "name": "csharp",
   "publisher": "ms-vscode",
-  "version": "1.5.0-beta5",
+  "version": "1.5.0-beta6",
   "description": "C# for Visual Studio Code (powered by OmniSharp).",
   "displayName": "C#",
   "author": "Microsoft Corporation",
   "license": "SEE LICENSE IN RuntimeLicenses/license.txt",
   "icon": "images/csharpIcon.png",
-  "preview": "true",
+  "preview": true,
   "bugs": {
     "url": "https://github.com/OmniSharp/omnisharp-vscode/issues"
   },