Add remove_disfluencies support to the streaming API client

[amikofalvy]

As a RevAi golang sdk user, I would like to be able to specify the option to remove disfluencies from my transcript when using the streaming client.

This issue is being opened in an effort to reach feature parity with the streaming websocket API.

The feature is documented here: https://www.rev.ai/docs/streaming#section/WebSocket-Endpoint/Remove-Disfluencies-(Beta)

[threeaccents]

035fc59