Add Conversations.kick API method

[supagroova]

Adding the new Conversations kick API method to docs to be included in client. This was missing from the original docs which create the client API methods. Since the Channels.kick method has been deprecated this is now the only alternative.

[supagroova]

@BlakeWilliams not sure if this is of interest to you guys. Also not sure why this would break the build. If you'd like to include this in the official version it's here. 👍