Merge pull request #22 from dustinspecker/greenkeeper-nyc-6.0.0

Update nyc to version 6.0.0 🚀

package.json

@@ -34,6 +34,6 @@
     "eslint-plugin-new-with-error": "^1.1.0",
     "eslint-plugin-no-use-extend-native": "^0.3.1",
     "is-plain-obj": "^1.0.0",
-    "nyc": "^5.3.0"
+    "nyc": "^6.0.0"
   }
 }