chore: upgrade to new Zone.js API v0.6.2

BREAKING CHANGE

Removed deprecated API from NgZone
- `NgZone.overrideOnTurnStart`
- `NgZone.overrideOnTurnDone`
- `NgZone.overrideOnEventDone`
- `NgZone.overrideOnErrorHandler`

Rename NgZone API
- `NgZone.onTurnStart` => `NgZone.onUnstable`
- `NgZone.onTurnDone` => `NgZone.onMicrotaskEmpty`
- `NgZone.onEventDone` => `NgZone.onStable`

Closes #7345

package.json

@@ -36,7 +36,7 @@
     "es6-shim": "^0.33.3",
     "reflect-metadata": "0.1.2",
     "rxjs": "5.0.0-beta.2",
-    "zone.js": "0.5.15"
+    "zone.js": "^0.6.4"
   },
   "devDependencies": {
     "angular": "^1.5.0",