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.
setup.py
'google-api-core>=1.25.1,<3.0.0',
    'google-api-python-client>=1.6.0,<2.0.0',
    
    
    
    'google-auth>=1.0.0,<3.0.0',
    'google-auth-httplib2>=0.0.1',
    'google-cloud-automl>=2.1.0,<3.0.0',
    'google-cloud-bigquery-datatransfer>=3.0.0,<4.0.0',
    'google-cloud-bigtable>=1.0.0,<2.0.0',
    'google-cloud-build>=3.0.0,<4.0.0',
    'google-cloud-container>=0.1.1,<2.0.0',
    'google-cloud-datacatalog>=3.0.0,<4.0.0',
    'google-cloud-dataproc>=2.2.0,<2.6.0',
    'google-cloud-dlp>=0.11.0,<2.0.0',
    'google-cloud-kms>=2.0.0,<3.0.0',
    'google-cloud-language>=1.1.1,<2.0.0',
    'google-cloud-logging>=2.1.1,<3.0.0',
    
    
    'google-cloud-memcache>=0.2.0,<1.1.0',
    'google-cloud-monitoring>=2.0.0,<3.0.0',
    'google-cloud-os-login>=2.0.0,<3.0.0',
    'google-cloud-pubsub>=2.0.0,<3.0.0',
    'google-cloud-redis>=2.0.0,<3.0.0',
    'google-cloud-secret-manager>=0.2.0,<2.0.0',
    'google-cloud-spanner>=1.10.0,<2.0.0',
    'google-cloud-speech>=0.36.3,<2.0.0',
    'google-cloud-storage>=1.30,<2.0.0',