Outdated pypi package

[372046933]

• Describe what feature you would like to see implemented.
  Will pypi host latest package?

• If possible, give an example of how it may look in the code and what result
  will be produced.
  datatable on pypi is released: Jul 2, 2021. Taking this example. datatable.Frame.to_csv hex parammeter does not exist on pypi

• Click "Preview" to check that there are no formatting problems, that the
  request is stated clearly, and that it is not overbroad in scope.

• Thanks for contributing. We appreciate your input!

[Oleksiy]

It will be released when we implement all the planned features. Meanwhile, you can install the latest dev version: https://datatable.readthedocs.io/en/latest/start/install.html#install-latest-dev-version