chore(package): update zone.js to version 0.6.6

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -17,7 +17,7 @@
     "reflect-metadata": "0.1.2",
     "rxjs": "5.0.0-beta.2",
     "systemjs": "0.19.23",
-    "zone.js": "0.6.4"
+    "zone.js": "0.6.6"
   },
   "devDependencies": {
     "concurrently": "1.0.0",