chore(package): update nyc to version 14.1.1

Closes #387

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "mocha": "5.2.0",
     "mocha-typescript": "1.1.17",
     "moment": "2.24.0",
-    "nyc": "13.3.0",
+    "nyc": "14.1.1",
     "prettier": "1.16.4",
     "source-map-support": "0.5.10",
     "ts-node": "8.0.2",