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_PRIVATE_KEY_EXTRA,
                host='localhost',
                conn_type='ssh',
                extra=json.dumps({"private_key": TEST_PRIVATE_KEY}),
            )
        )
        db.merge_conn(
            Connection(
                conn_id=cls.CONN_SSH_WITH_PRIVATE_KEY_PASSPHRASE_EXTRA,
                host='localhost',
                conn_type='ssh',
                extra=json.dumps(
                    {"private_key": TEST_ENCRYPTED_PRIVATE_KEY, "private_key_passphrase": PASSPHRASE}
                ),
            )
        )
        db.merge_conn(
            Connection(
                conn_id=cls.CONN_SSH_WITH_PRIVATE_KEY_ECDSA_EXTRA,
                host='localhost',
                conn_type='ssh',
                extra=json.dumps({"private_key": TEST_PRIVATE_KEY_ECDSA}),
            )
        )
        db.merge_conn(
            Connection(