Bump commander from 6.1.0 to 6.2.1 (#6457)

Bumps [commander](https://github.com/tj/commander.js) from 6.1.0 to 6.2.1.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tj/commander.js/compare/v6.1.0...v6.2.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -123,7 +123,7 @@
     "@types/selenium-webdriver": "^4.0.10",
     "ajv-cli": "^3.0.0",
     "codelyzer": "^6.0.1",
-    "commander": "6.1.0",
+    "commander": "6.2.1",
     "concurrently": "^5.3.0",
     "cspell": "^4.2.3",
     "css-loader": "^4.3.0",