Initialize open publishing repository: https://cpubwin.visualstudio.com/DefaultCollection/powershell/_git/powershell of branch master

Author: brianlic-msft

Diff for: .openpublishing.publish.config.json

@@ -8,7 +8,7 @@
       "build_output_subfolder": "powershell",
       "locale": "en-us",
       "version": 0,
-      "open_to_public_contributors": false,
+      "open_to_public_contributors": true,
       "type_mapping": {
         "Conceptual": "Content",
         "ManagedReference": "Content",