Add support for binary parameter and response type in the Perl API client. A good starting point is to look at how other languages make similar changes: Ruby: https://github.com/swagger-api/swagger-codegen/pull/1934 Java: https://github.com/swagger-api/swagger-codegen/pull/1898 C#: https://github.com/swagger-api/swagger-codegen/pull/1864 PHP: https://github.com/swagger-api/swagger-codegen/pull/1891 If anyone from the community wants to work on this, please reply to let us know.