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

Closes #44

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "jest": "24.8.0",
     "rimraf": "2.6.3",
     "ts-jest": "24.0.2",
-    "ts-node": "8.1.1",
+    "ts-node": "8.4.1",
     "tslint": "5.12.0",
     "tslint-config-prettier": "1.17.0",
     "typescript": "3.2.2"