chore(package): update zone.js to version 0.6.26

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -73,7 +73,7 @@
     "typescript": "^2.0.0",
     "validate-commit-msg": "^2.6.1",
     "webpack": "^1.13.0",
-    "zone.js": "^0.6.23"
+    "zone.js": "^0.6.26"
   },
   "config": {
     "ghooks": {