Update nyc to the latest version 🚀 (#2367)

Author: greenkeeper[bot]

package.json

@@ -123,7 +123,7 @@
     "lint-staged": "^3.4.0",
     "node-fetch": "1.7.1",
     "node-notifier": "5.1.2",
-    "nyc": "11.0.1",
+    "nyc": "11.0.3",
     "react": "15.5.4",
     "react-dom": "15.5.4",
     "standard": "9.0.2",