chore(package): update ts-node to version 4.0.1

Closes #20

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
   "devDependencies": {
     "greenkeeper-postpublish": "^1.0.1",
     "source-map-support": "~0.4.3",
-    "ts-node": "^3.0.3",
+    "ts-node": "^4.0.1",
     "tslint": "^5.2.0",
     "tslint-config-typings": "^0.3.1",
     "typescript": "^2.0.3",