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.
airflow/providers/ssh/hooks/ssh.py
"""
    Hook for ssh remote execution using Paramiko.
    ref: https://github.com/paramiko/paramiko
    This hook also lets you create ssh tunnel and serve as basis for SFTP file transfer
    :param ssh_conn_id: :ref:`ssh connection id<howto/connection:ssh>` from airflow
        Connections from where all the required parameters can be fetched like
        username, password or key_file. Thought the priority is given to the
        param passed during init
    :type ssh_conn_id: str
    :param remote_host: remote host to connect
    :type remote_host: str
    :param username: username to connect to the remote_host
    :type username: str
    :param password: password of the username to connect to the remote_host
    :type password: str
    :param key_file: path to key file to use to connect to the remote_host
    :type key_file: str
    :param port: port of remote host to connect (Default is paramiko SSH_PORT)
    :type port: int