In extras_require, the websocket-client version is missing a comma. Discovered while updating a conda env which contains slack-sdk.
"websocket-client>=0.57<1"
# --->
"websocket-client>=0.57,<1"
Conda warning:
WARNING conda.core.index:push_record(261): Skipping pypi/pypi::slack-sdk-3.4.0-pypi_0 due to InvalidSpec: 0.57<1
slack-sdk==3.4.0
Python 3.8.5
Thanks for reporting this @jj-ookla!
We will take a look at fixing this
@jj-ookla Thanks for reporting this!