chore(package): update nyc to version 11.4.1

Author: greenkeeper[bot]

package.json

@@ -63,7 +63,7 @@
     "ava": "0.23.0",
     "coveralls": "2.13.2",
     "execa": "0.8.0",
-    "nyc": "11.3.0",
+    "nyc": "11.4.1",
     "standard-version": "4.2.0",
     "text-loader": "0.0.1",
     "webpack": "3.10.0",