Consider bundling

Benefits of bundling all `dist/` files into one:
- Smaller npm publish size
- Possibility of inlining small dependencies, so users get faster `npm install` times
- No need to [dynamically `require` the `package.json` to get the version](https://github.com/cloudfour/lighthouse-parade/blob/v0.2.1/cli.ts#L8-L13)

Start by inspecting the current files under dist/ and the entry point in cli.ts, especially the linked version lookup around lines 8–13. Compare the current published output with the proposed single bundle and verify the reported goals: npm package size, dependency inlining, install time, and version handling.

Written by the indexing model from the issue text.