[Feature Request] Support for AES-256 encryption

[papb]

It would be awesome to see support for AES-256 encryption in yazl. This would be the last thing I need before I can completely stop calling 7zip via execa, and solve all my zipping needs in pure Node.

I have zero knowledge on how to implement this, is this very hard to implement?

Thank you very much for this library!!

I have also opened a mirror issue for yauzl: thejoshwolfe/yauzl#121