v0.10.19 -- faust cli is not found in PATH after install

[swelborn]

Steps to reproduce

Install faust-streaming:

conda create -n test
conda activate test
conda install pip
pip install faust-streaming==0.10.19

Run faust:

faust
zsh: command not found: faust

Workaround is

python -m faust ...

Or you can install previous version, and faust can be found:

pip install faust-streaming==0.10.17

faust
# normal output

Expected behavior

Expected: faust command line interface works

Actual behavior

faust command line interface doesn't work.

[wbarnha]

Agh, I think I broke it in the changes I made to setup.py, sorry about that! Willfix ASAP.