Adding tests

Have you considered adding support for tests? This would make it much more useful as a potential React starter kit, while still keeping it relatively minimal. I already did it in a fork for my own use, and I'd be willing to make a PR, but I wonder if you're willing to move this project in that direction, or you want to keep it as an example of how minimal things are with parcel?

Review the repository's minimal React app and the fork mentioned in the issue. Confirm with the maintainer whether tests should be added while preserving the Parcel example's minimal scope, then establish the test framework and acceptance criteria before implementing.

Written by the indexing model from the issue text.