chore(package): update ts-node to version 8.8.1

Closes #94

Author: greenkeeper[bot]

package.json

@@ -93,7 +93,7 @@
     "nodemon": "1.18.7",
     "prettier": "1.15.2",
     "rimraf": "2.6.2",
-    "ts-node": "^7.0.1",
+    "ts-node": "^8.8.1",
     "tslint": "5.11.0",
     "tslint-config-prettier": "1.17.0",
     "tslint-microsoft-contrib": "6.0.0"