Update ts-node to the latest version 🚀 (#229)

Author: mayurkale22

packages/opencensus-core/package-lock.json

@@ -50,7 +50,7 @@
     "mocha": "^5.0.4",
     "ncp": "^2.0.0",
     "nyc": "11.6.0",
-    "ts-node": "^4.0.0",
+    "ts-node": "^7.0.1",
     "typescript": "~2.6.1"
   },
   "dependencies": {

packages/opencensus-core/package.json

@@ -49,7 +49,7 @@
     "ncp": "^2.0.0",
     "nock": "^9.2.6",
     "nyc": "11.6.0",
-    "ts-node": "^4.0.0",
+    "ts-node": "^7.0.1",
     "typescript": "~2.6.1"
   },
   "dependencies": {