fix null ref on dictionary query

unity_package/Runtime/VELConnectManager.cs

@@ -710,7 +710,8 @@ namespace VELConnect
 			{
 				foreach (string key in data.Keys.ToArray())
 				{
-					if (instance.state.room.data[key] == data[key])
+					instance.state.room.data.TryGetValue(key, out string currentValue);
+					if (currentValue == data[key])
 					{
 						data.Remove(key);
 					}

unity_package/package.json

@@ -1,7 +1,7 @@
 {
   "name": "edu.uga.engr.vel.vel-connect",
   "displayName": "VEL-Connect",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "unity": "2019.1",
   "description": "Web-based configuration for VR applications",
   "keywords": [],