Initialzie a new `PubEmitterSocket`.

@api private
function PubEmitterSocket() {
  this.sock = new PubSocket;
  this.emit = this.sock.send.bind(this.sock);
  this.bind = this.sock.bind.bind(this.sock);
  this.connect = this.sock.connect.bind(this.sock);
  this.close = this.sock.close.bind(this.sock);
}