chore(package): update nyc to version 14.1.0

Closes #9

Author: greenkeeper[bot]

package.json

@@ -56,7 +56,7 @@
     "eslint": "^4.9.0",
     "eslint-config-airbnb": "^17.0.0",
     "expect.js": "^0.3.1",
-    "nyc": "^11.2.1",
+    "nyc": "^14.1.0",
     "rimraf": "^2.5.2"
   },
   "files": [