Cannot export value on deconstruction

For example, the following two cases cannot be scanned by l10-dev:

```
import * as vscode from 'vscode';
const {
  l10n: { t },
} = vscode;
const { l10n: aaa } = vscode;

console.log(t('Hello {0}', ['yiliang114']));
console.log(aaa.t('Hi {0}', ['yiliang114']));
```