Koalas support for ComposeML

[mohitjn91]

Hi Team, as per documentation ComposeML is a crucial step for automated ML pipeline. For our project, the dataset cannot be loaded into pandas dataframe because of its huge size. Therefore we started working with Koalas dataframe. But now we have hit a roadblock since ComposeML does not support Koalas.

Request you to provide Koalas support for the entire automated pipeline

[thehomebrewnerd]

Given recent changes to Featuretools and Koalas, this would now need to be updated to use the new spark pandas API instead of Koalas.