chore(generic): upgrade fs-extra to v5 and inquirer to v5

fs-extra changes:
https://github.com/jprichardson/node-fs-extra/blob/master/CHANGELOG.md#500--2017-12-11

inquirer changes:
https://github.com/SBoudrias/Inquirer.js/releases/tag/v5.0.0

package.json

@@ -120,10 +120,10 @@
     "electron-packager": "^10.1.0",
     "electron-rebuild": "^1.6.0",
     "form-data": "^2.1.4",
-    "fs-extra": "^4.0.0",
+    "fs-extra": "^5.0.0",
     "github": "^12.0.3",
     "glob": "^7.1.1",
-    "inquirer": "^4.0.0",
+    "inquirer": "^5.0.0",
     "lodash.merge": "^4.6.0",
     "lodash.template": "^4.4.0",
     "log-symbols": "^2.0.0",