fix: upgrade ts-node from 8.0.3 to 8.7.0

Snyk has created this PR to upgrade ts-node from 8.0.3 to 8.7.0.

See this package in NPM:
https://www.npmjs.com/package/ts-node

See this project in Snyk:
https://app.snyk.io/org/retorquere/project/d251eee8-20da-4534-b776-17ba5b317e12?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -37,7 +37,7 @@
     "rimraf": "^2.6.3",
     "toml-js": "0.0.8",
     "ts-loader": "^5.3.3",
-    "ts-node": "^8.0.3",
+    "ts-node": "^8.7.0",
     "tslint": "^5.15.0",
     "typescript": "^3.4.3",
     "uri-templates": "^0.2.0",