ssh provider has limit to sshtunnel  < 0.2
https://github.com/apache/airflow/blob/9d6ae609b60449bd274c2f96e72486d73ad2b8f9/setup.py#L451

I don't know why? sshtunnel  already released 0.4
I didn't open PR because I don't know this provider i just tried to install it and couldn't due to conflicts with other requirements in my system so eventually i used vitrual env to solve my problem but logging this issue so that someone who knows this code can handle it.
tests/providers/ssh/hooks/test_ssh.py
db.merge_conn(
            Connection(
                conn_id=cls.CONN_SSH_WITH_NO_EXTRA,
                host='localhost',
                conn_type='ssh',
                extra=None,
            )
        )
        db.merge_conn(
            Connection(
                conn_id=cls.CONN_SSH_WITH_EXTRA,
                host='localhost',
                conn_type='ssh',
                extra='{"compress" : true, "no_host_key_check" : "true", "allow_host_key_change": false}',
            )
        )
        db.merge_conn(
            Connection(
                conn_id=cls.CONN_SSH_WITH_EXTRA_FALSE_LOOK_FOR_KEYS,
                host='localhost',
                conn_type='ssh',
                extra='{"compress" : true, "no_host_key_check" : "true", '
                '"allow_host_key_change": false, "look_for_keys": false}',