bug: Invalid Internal Id

I try to use your plugin instead of that one from @ionic, but I'm running into this issue:

```
Rollup: Invalid External Id
'polyfill-node.https.js' is imported as an external by polyfill-node.https.js?commonjs-proxy, but is
already an existing non-external module id.
```

I do nothing special, just loading the plugin in the "after" of rollup plugins, like i did in that one before

Any idea?