fix(package): update ts-node to version 8.4.1

Closes #38

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/shawnkoon/coding-challenge-typescript#readme",
   "dependencies": {
-    "ts-node": "8.3.0",
+    "ts-node": "8.4.1",
     "tslint": "5.9.1",
     "typescript": "^3.3.3333"
   },