Update dependency ts-node to v8.9.1

Author: renovate-bot

package-lock.json

@@ -93,7 +93,7 @@
     "semantic-release": "15.13.3",
     "travis-deploy-once": "5.0.11",
     "ts-helpers": "1.1.2",
-    "ts-node": "8.0.3",
+    "ts-node": "8.9.1",
     "tsickle": "0.34.3",
     "tslib": "1.9.3",
     "tslint": "5.15.0",