chore(package): update nyc to version 11.8.0

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   "homepage": "https://github.com/Gerhut/create-function#readme",
   "devDependencies": {
     "mocha": "^5.0.0",
-    "nyc": "^11.0.2",
+    "nyc": "^11.8.0",
     "should": "^13.0.1",
     "standard": "^11.0.0"
   },