Bump commander from 2.19.0 to 2.20.0

Bumps [commander](https://github.com/tj/commander.js) from 2.19.0 to 2.20.0.
- [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/v2.19.0...v2.20.0)
Signed-off-by: dependabot[bot] <support@dependabot.com>

yarn.lock

@@ -2688,9 +2688,9 @@ commander@2.9.x:
     graceful-readlink ">= 1.0.0"
 
 commander@^2.19.0, commander@^2.9.0:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
-  integrity sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==
+  version "2.20.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
+  integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
 
 commander@~2.11.0:
   version "2.11.0"