chore(package): update ts-node to version 6.0.4

Closes #8

Author: greenkeeper[bot]

package.json

@@ -119,7 +119,7 @@
     "rxjs-marbles": "^2.3.1",
     "semantic-release": "^15.0.0",
     "ts-jest": "^22.0.0",
-    "ts-node": "^5.0.1",
+    "ts-node": "^6.0.4",
     "tslint": "^5.8.0",
     "tslint-config-prettier": "^1.1.0",
     "tslint-config-standard": "^7.0.0",