Chore(deps): bump commander from 3.0.2 to 4.0.0

Bumps [commander](https://github.com/tj/commander.js) from 3.0.2 to 4.0.0.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](tj/commander.js@v3.0.2...v4.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -48,7 +48,7 @@
     "standard": "14.3.1"
   },
   "dependencies": {
-    "commander": "^3.0.2",
+    "commander": "^4.0.0",
     "file-exists": "^5.0.1",
     "fs-readfile-promise": "^3.0.1",
     "js-yaml": "^3.13.1",