chore(deps): update dependency typescript to v3

Author: renovate-bot

package-lock.json

@@ -96,7 +96,7 @@
     "tsickle": "0.32.1",
     "tslib": "1.9.3",
     "tslint": "5.11.0",
-    "typescript": "2.9.2",
+    "typescript": "3.1.1",
     "travis-deploy-once": "5.0.7",
     "semantic-release": "15.9.15"
   },