chore(package): update nyc to version 11.1.0

Closes #81

Author: greenkeeper[bot]

package.json

@@ -71,7 +71,7 @@
     "mocha": "3.4.1",
     "nock": "9.0.13",
     "nodemon": "1.11.0",
-    "nyc": "11.0.2",
+    "nyc": "11.1.0",
     "should": "11.2.1",
     "sinon": "2.3.4",
     "slash": "1.0.0",