chore(deps): update dependency nyc to v11.8.0

Author: renovate-bot

package.json

@@ -47,7 +47,7 @@
     "@types/node": "8.5.7",
     "coveralls": "3.0.0",
     "cucumber": "3.2.1",
-    "nyc": "11.4.1",
+    "nyc": "11.8.0",
     "semantic-release": "12.1.0",
     "ts-node": "4.1.0",
     "typescript": "2.6.2"