lnc typings: unable to resolve module error

I tried to use typing present in the package but module resolution fails for tests like jest and such 

```
import {
  Invoice,
  Invoice_InvoiceState,
} from "@lightninglabs/lnc-core/dist/types/proto/lnd/lightning";
```

```Cannot find module '@lightninglabs/lnc-core/dist/types/proto/lnd/lightning' from 'src/extension/background-script/connectors/lnc.ts'```
