chore(package): update nyc to version 11.2.1

Closes #70

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "ava": "0.22.0",
     "coveralls": "2.13.1",
     "nsp": "2.7.0",
-    "nyc": "11.1.0",
+    "nyc": "11.2.1",
     "standard": "10.0.3"
   },
   "dependencies": {