Operator version

[yubozhao]

Description

Motivation and Context

How Has This Been Tested?

Checklist:

• My code follows the bentoctl code style, both make format and
  make lint script have passed
• My change reduces project test coverage and requires unit tests to be added
• I have added unit tests covering my code change
• My change requires a change to the documentation
• I have updated the documentation accordingly

[jjmachan]

I guess we need to update the lock file too. You can run poetry lock --no-update so that it just updates the lock files without reinstalling bentoml

[jjmachan]

I guess we still have to update the tests. I can pitch in if you want to finish that up and may be can do a small refactor for the tests too