package: update nyc to 14.x

Author: sam-github

package.json

@@ -58,7 +58,7 @@
     "eslint-plugin-standard": "^4.0.0",
     "intelli-espower-loader": "^1.0.1",
     "mocha": "^6.0.2",
-    "nyc": "^13.3.0",
+    "nyc": "^14.0.0",
     "power-assert": "^1.6.1",
     "sinon": "^7.3.1"
   }