Node package.json exports field not understood.

Hi

I am importing from a node_modules package that uses the exports field to redirect to /dist

```json
"exports": {
"./*": "./dist/*"
}
```

However these dependencies are not found and show up in the nonExistent array.

```js
const nonExistent = []
const dependencies = dependencyTree.toList({
filename: filePathFull,
directory: process.cwd(),
nonExistent,
})
```

I have checked moving the imported files to the root of the package, and it does then find them - so it seems that the exports field is not understood.

I may be willing to work on this, if it's not a simple fix. Would it be a filing-cabinet issue?

Thanks

Reproduce the missing-dependency case with a node_modules package whose package.json exports maps './*' to './dist/*', then trace dependencyTree.toList and its nonExistent handling. Done means imports redirected through the exports field are resolved instead of added to nonExistent.

Written by the indexing model from the issue text.