update tslib to version 1.11.1

Author: tiagoschenkel

package.json

@@ -54,7 +54,7 @@
   },
   "dependencies": {
     "@robotlegsjs/core": "^1.0.3",
-    "tslib": "^1.10.0"
+    "tslib": "^1.11.1"
   },
   "peerDependencies": {
     "phaser-ce": "^2.8.1",