Repo and codelab drift

Hello Google Codelab team,

This repo has drifted a bit to the point where it needs a lot of fiddling to get functional It looks like some of the imports and library versions are dated as well. It would be super helpful for future explorers to make things a bit simpler to get up and running.

No specific files, tests, imports, or library versions are named. Start by checking out the repository and trying to get the codelab functional, then identify the dated imports and library versions; done means the setup works with simpler onboarding for future explorers.

Written by the indexing model from the issue text.