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
'sendgrid': sendgrid,
    'sftp': ssh,
    'singularity': singularity,
    'slack': slack,
    'snowflake': snowflake,
    'sqlite': [],
    'ssh': ssh,
    'telegram': telegram,
    'vertica': vertica,
    'yandex': yandex,
    'zendesk': zendesk,
}
EXTRAS_REQUIREMENTS: Dict[str, List[str]] = {
    'apache.atlas': atlas,
    'apache.beam': apache_beam,
    'apache.webhdfs': webhdfs,
    'async': async_packages,
    'cgroups': cgroups,
    'dask': dask,
    'github_enterprise': flask_oauth,
    'google_auth': flask_oauth,
    'kerberos': kerberos,
    'ldap': ldap,
    'password': password,
    'rabbitmq': rabbitmq,
    'sentry': sentry,
    'statsd': statsd,
    'virtualenv': virtualenv,
}
def add_extras_for_all_providers() -> None: