Dev/camera system updates (#38)

* updated the usages of camera cache main if the camera rig's camera reference

* bumped versions

SpatialObservers/LuminSpatialMeshObserver.cs

@@ -11,6 +11,7 @@
 using UnityEngine.Experimental.XR;
 using UnityEngine.XR.MagicLeap;
 using XRTK.Definitions.SpatialAwarenessSystem;
+using XRTK.Services;
 using XRTK.Utilities;
 #endif // PLATFORM_LUMIN
 
@@ -102,9 +103,8 @@ public override void Update()
             // Update the observer location if it is not stationary
             if (!IsStationaryObserver)
             {
-                var cameraTransform = CameraCache.Main.transform;
-                ObserverOrigin = cameraTransform.position;
-                ObserverOrientation = cameraTransform.rotation;
+                ObserverOrigin = MixedRealityToolkit.CameraSystem.CameraRig.CameraTransform.position;
+                ObserverOrientation = MixedRealityToolkit.CameraSystem.CameraRig.CameraTransform.rotation;
             }
 
             ConfigureObserverVolume();

package.json

@@ -20,6 +20,6 @@
   "author": "XRTK Team (https://github.com/XRTK)",
   "dependencies": {
     "com.unity.xr.magicleap": "2.0.0-preview.19",
-    "com.xrtk.core": "0.1.21"
+    "com.xrtk.core": "0.1.25"
   }
 }