chore(package): update nyc to version 14.0.0

Closes #31

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "loopback-testing": "^1.4.0",
     "mocha": "^3.3.0",
     "nodemon": "^1.11.0",
-    "nyc": "^11.0.0",
+    "nyc": "^14.0.0",
     "semantic-release": "^6.3.2",
     "supertest": "^3.0.0"
   },