- Add the core `rollup` dep to the "rollup" group. It is maintained by
   the same GitHub org, but doesn't start with `@rollup/`

 - Add groups for `@types/` package. These are all sourced from the same
   organization.

 - Rename `lint` => `eslint`. This avoids ambiguity if copying this
   config into other repos that also use Python linters.