chore(package): update nyc to version 14.1.1

Closes #20

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "eslint": "^5.12.1",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-plugin-import": "^2.15.0",
-    "nyc": "^13.1.0"
+    "nyc": "^14.1.1"
   },
   "dependencies": {
     "bluebird": "^3.5.3",