chore(deps): bump commander from 5.1.0 to 6.0.0

Bumps [commander](https://github.com/tj/commander.js) from 5.1.0 to 6.0.0.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](tj/commander.js@v5.1.0...v6.0.0)

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

Author: dependabot-preview[bot]

packages/cli/package.json

@@ -29,7 +29,7 @@
     "@apielements/openapi2-parser": "^0.32.3",
     "@apielements/openapi3-parser": "^0.15.0",
     "cardinal": "^2.1.1",
-    "commander": "^5.1.0",
+    "commander": "^6.0.0",
     "js-yaml": "^3.12.0",
     "minim": "^0.23.8"
   },

yarn.lock

@@ -1908,10 +1908,10 @@ commander@^3.0.2:
   resolved "https://registry.yarnpkg.com/commander/-/commander-3.0.2.tgz#6837c3fb677ad9933d1cfba42dd14d5117d6b39e"
   integrity sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow==
 
-commander@^5.1.0:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-5.1.0.tgz#46abbd1652f8e059bddaef99bbdcb2ad9cf179ae"
-  integrity sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==
+commander@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-6.0.0.tgz#2b270da94f8fb9014455312f829a1129dbf8887e"
+  integrity sha512-s7EA+hDtTYNhuXkTlhqew4txMZVdszBmKWSPEMxGr8ru8JXR7bLUFIAtPhcSuFdJQ0ILMxnJi8GkQL0yvDy/YA==
 
 commondir@^1.0.1:
   version "1.0.1"