chore(package): update typescript to version 2.5.2

Author: greenkeeper[bot]

package.json

@@ -50,7 +50,7 @@
     "tslint": "5.7.0",
     "tslint-loader": "3.5.3",
     "typedoc": "0.8.0",
-    "typescript": "2.4.2",
+    "typescript": "2.5.2",
     "uuid": "3.1.0",
     "webpack": "3.5.5"
   },