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
ssh_hook = SSHHook(ssh_conn_id=self.CONN_SSH_WITH_EXTRA_FALSE_LOOK_FOR_KEYS)
        assert ssh_hook.look_for_keys is False
    @mock.patch('airflow.providers.ssh.hooks.ssh.SSHTunnelForwarder')
    def test_tunnel_with_private_key(self, ssh_mock):
        hook = SSHHook(
            ssh_conn_id=self.CONN_SSH_WITH_PRIVATE_KEY_EXTRA,
            remote_host='remote_host',
            port='port',
            username='username',
            timeout=10,
        )
        with hook.get_tunnel(1234):
            ssh_mock.assert_called_once_with(
                'remote_host',
                ssh_port='port',
                ssh_username='username',
                ssh_pkey=TEST_PKEY,
                ssh_proxy=None,
                local_bind_address=('localhost',),
                remote_bind_address=('localhost', 1234),
                host_pkey_directories=[],
                logger=hook.log,
            )
    @mock.patch('airflow.providers.ssh.hooks.ssh.SSHTunnelForwarder')
    def test_tunnel_with_private_key_passphrase(self, ssh_mock):