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
TEST_OPENSSH_PRIVATE_KEY = "-----BEGIN OPENSSH " + textwrap.dedent(
            """\
        PRIVATE KEY-----
        b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAlwAAAAdzc2gtcn
        NhAAAAAwEAAQAAAIEAuPKIGPWtIpMDrXwMAvNKQlhQ1gXV/tKyufElw/n6hrr6lvtfGhwX
        DihHMsAF+8+KKWQjWgh0fttbIF3+3C56Ns8hgvgMQJT2nyWd7egwqn+LQa08uCEBEka3MO
        arKzj39P66EZ/KQDD29VErlVOd97dPhaR8pOZvzcHxtLbU6rMAAAIA3uBiZd7gYmUAAAAH
        c3NoLXJzYQAAAIEAuPKIGPWtIpMDrXwMAvNKQlhQ1gXV/tKyufElw/n6hrr6lvtfGhwXDi