chore: Update jupyterlite (#93)

* Update jupyterlite feature to use jupyterlite v0.5.0 for better handling
  of kernel restarts.
   - c.f. https://github.com/jupyterlite/jupyterlite/releases/tag/v0.5.0
* Add depends-on for build-lite to serve and add caching inputs and outputs
  for build-lite.

Author: matthewfeickert