rocketmq-client-python which using pip install has no ConsumeStatus

1. Please describe the issue you observed:
rocketmq-client-python which using pip install has no ConsumeStatus Class

2. Please tell us about your environment:
mac os

3. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):
I follow the README.md file, using 'pip install rocketmq-client-python' command to install the package. When I finish, I find that I cannot import ConsumeStatus Class. Then I download the source code from github, using python setup.py to install. It works. But Why???

Compare the published package installed with `pip install rocketmq-client-python` against the source installed with `python setup.py`, using the README.md installation instructions as the starting point. Trace how ConsumeStatus is included in each distribution and verify that a clean pip installation can import it; the issue is done when both installation paths expose the same class.

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