Export eslint plugin: return passthrough result or update arguments

Imagine the following:
```typescript
if (__passThrough__.callTarget("foo") !== __passThrough__) {
doSomethingElse();
}
```

This is dangerous. Equally bad would be someone calling `__passThrough__.callTarget("foo")` after changing one of the arguments and not updating `__passThrough__.modifiedArguments`.