Merge #3158

Merge #3158

3158: Disable rollup warning r=matklad a=edwin0cheng

In https://rollupjs.org/guide/en/#output-exports

```
As with regular entry points, files that mix default and named exports will produce warnings. You can avoid the warnings by forcing all files to use named export mode via output.exports: "named".
```

This PR try added `output.exports: "named"` and disabe this warning. It is because vscode consume our plugins only by named functions such that it should be saved to disable it.

cc @Veetaha

Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>