fix(package): update nopt to version 4.0.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
     "inquirer": "^1.2.2",
     "js-yaml": "^3.3.1",
     "lodash": "^4.16.4",
-    "nopt": "^3.0.2",
+    "nopt": "^4.0.0",
     "npm": "^4.0.3",
     "npm-registry-client": "^7.3.0",
     "npmlog": "^4.0.0",