Got directed to this repo from the rollup website.
Trying to figure out how to use Rollup to ship a TypeScript React component library as ESM.
It looks like the packages being used in the TypeScript example are wrong:
https://github.com/rollup/rollup-starter-lib/blob/typescript/package.json#L13-L15
The latest versions of plugins have been moved under the @rollup organization on npm and the example should be updated to use those packages.
https://github.com/rollup/plugins/tree/master/packages/typescript