Fix multiplayer package issue.

Author: surfnerd

DevProject/Packages/manifest.json

@@ -10,7 +10,7 @@
     "com.unity.ide.vscode": "1.1.4",
     "com.unity.ml-agents": "file:../../com.unity.ml-agents",
     "com.unity.ml-agents.extensions": "file:../../com.unity.ml-agents.extensions",
-    "com.unity.multiplayer-hlapi": "1.0.4",
+    "com.unity.multiplayer-hlapi": "1.0.6",
     "com.unity.package-manager-doctools": "1.1.1-preview.3",
     "com.unity.package-validation-suite": "0.11.0-preview",
     "com.unity.purchasing": "2.0.6",