Changes to get a list of maintainers from a registry

the query request parameter sort was restricted to a list of enum values

added the new enum value created_at to the query request parameter sort

added the new enum value login to the query request parameter sort

added the new enum value name to the query request parameter sort

added the new enum value packages_count to the query request parameter sort

added the new enum value updated_at to the query request parameter sort

added the new enum value uuid to the query request parameter sort

added the required property items/total_downloads to the response with the 200 status

the response property items/email became nullable for the status 200

the response property items/html_url became nullable for the status 200

the response property items/login became nullable for the status 200

the response property items/name became nullable for the status 200

the response property items/role became nullable for the status 200

the response property items/url became nullable for the status 200

the response property items/created_at became required for the status 200

the response property items/email became required for the status 200

the response property items/html_url became required for the status 200

the response property items/login became required for the status 200

the response property items/name became required for the status 200

the response property items/packages_count became required for the status 200

the response property items/packages_url became required for the status 200

the response property items/role became required for the status 200

the response property items/updated_at became required for the status 200

the response property items/url became required for the status 200

the response property items/uuid became required for the status 200

added the optional property items/html_url to the response with the 200 status

added the optional property items/role to the response with the 200 status

api tag maintainers added

added the optional property items/packages_url to the response with the 200 status

endpoint added