message: feat(docs-infra): add v6 to the aio version picker
diff: ],
  "docVersions": [
  + { "title": "v6", "url": "https://v6.angular.io" },
  { "title": "v5", "url": "https://v5.angular.io" },
  { "title": "v4", "url": "https://v4.angular.io" },
  { "title": "v2", "url": "https://v2.angular.io" },
  