Module augmentation

Hi! as im working on library now^ im expect that the vuei18n already installed in parent project.
But i faced with problem that ts do not see $t property in component
My shim looks like: 
```
declare module '*.vue' {
  import { defineComponent } from 'vue-demi';
  const Component: ReturnType<typeof defineComponent>;
  export default Component;
}
```

how can i augment it with $t? 
