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
]
docker = [
    'docker',
]
drill = ['sqlalchemy-drill>=1.1.0', 'sqlparse>=0.4.1']
druid = [
    'pydruid>=0.4.1',
]
elasticsearch = [
    'elasticsearch>7',
    'elasticsearch-dbapi',
    'elasticsearch-dsl>=5.0.0',
]
exasol = [
    'pyexasol>=0.5.1,<1.0.0',
]
facebook = [
    'facebook-business>=6.0.2',
]
flask_appbuilder_authlib = [
    'authlib',
]
google = [
    'PyOpenSSL',
    
    
    
    'google-ads>=12.0.0,<14.0.1',