Adding a new approved Authenticator to the gocql driver (conn.go)

[Jackson Fleming]

Hi,

I'm wanting to add a new authenticator to the approved list in the gocql project (https://github.com/gocql/gocql/blob/master/conn.go#L27). I'm happy to contribute this myself, but was wondering if there's a particular process to go through to have that completed?

Thanks,

Jackson