fix(@angular/cli): update version of zone.js to support Angular 4.0.0-rc.5

Fixes #5480

Author: Brocco

packages/@angular/cli/blueprints/ng/files/package.json

@@ -22,7 +22,7 @@
     "@angular/router": "<%= ng4 ? '>=4.0.0-beta <5.0.0' : '^3.4.0' %>",
     "core-js": "^2.4.1",
     "rxjs": "^5.1.0",
-    "zone.js": "^0.7.6"
+    "zone.js": "^0.8.4"
   },
   "devDependencies": {
     "@angular/cli": "<%= version %>",