Upgraded to TypeScript 3.0.1.

Fixed type errors in interface VRLayer by enriching the possible types
 for the subsequent properties 'leftBounds' and 'rightBounds'.

package.json

@@ -41,6 +41,6 @@
     "dependencies": {},
     "devDependencies": {
         "base64-font-loader": "0.0.4",
-        "typescript": "^2.8.1"
+        "typescript": "^3.0.1"
     }
 }

src/Cameras/babylon.webvr.ts

@@ -125,8 +125,8 @@ declare var VRDisplay: {
 };
 
 interface VRLayer {
-    leftBounds?: number[] | null;
-    rightBounds?: number[] | null;
+    leftBounds?: number[] | Float32Array | null;
+    rightBounds?: number[] | Float32Array | null;
     source?: HTMLCanvasElement | null;
 }