chore(package): update typescript to version 2.2.2 (#457)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -46,7 +46,7 @@
     "progress": "^1.1.8",
     "shelljs": "^0.7.0",
     "typedoc-default-themes": "^0.4.2",
-    "typescript": "2.2.1"
+    "typescript": "2.2.2"
   },
   "devDependencies": {
     "@types/mocha": "^2.2.39",