Hello,

Slack has released updates to its library and we can start using it for it. 

We especially like one change.

> slack_sdk has no required dependencies. This means aiohttp is no longer automatically resolved.

I've looked through the documentation and it doesn't look like a difficult task, but I think it's still worth testing.
More info: https://slack.dev/python-slack-sdk/v3-migration/index.html#from-slackclient-2-x

Best regards,
Kamil Breguła
setup.py
'pyexasol>=0.5.1,<1.0.0',
]
facebook = [
    'facebook-business>=6.0.2',
]
flask_oauth = [
    'Flask-OAuthlib>=0.9.1,<0.9.6',  
    'oauthlib!=2.0.3,!=2.0.4,!=2.0.5,<3.0.0,>=1.1.2',
    'requests-oauthlib<1.2.0',
]
google = [
    'PyOpenSSL',
    'google-ads>=4.0.0,<8.0.0',
    'google-api-python-client>=1.6.0,<2.0.0',
    'google-auth>=1.0.0,<2.0.0',
    '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-container>=0.1.1,<2.0.0',
    'google-cloud-datacatalog>=3.0.0,<4.0.0',
    'google-cloud-dataproc>=2.2.0,<3.0.0',
    '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>=1.14.0,<2.0.0',
    'google-cloud-memcache>=0.2.0',
    'google-cloud-monitoring>=0.34.0,<2.0.0',
    'google-cloud-os-login>=2.0.0,<3.0.0',
    'google-cloud-pubsub>=2.0.0,<3.0.0',