ERROR FirebaseError: Expected type '_Query', but it was: a custom _CollectionReference object in 21.0.0-rc.0

# Issue

Upgraded to the release candidate and using the following collection subscription:

``` typescript
collectionData(collection(firestore, `users/${u.uid}/devices`), {
idField: 'id',
})
```

# Error

ERROR FirebaseError: Expected type '_Query', but it was: a custom _CollectionReference object

# Analysis

Not sure how to provide more detail on this, but it seems to be during a cast to Query in the `onSnapshot` handler.

先在 21.0.0-rc.0 上重現 collectionData 範例，然後檢查 onSnapshot handler 及其轉型為 Query 的程式碼。當 collection subscription 不再針對 CollectionReference 引發 FirebaseError 時，即表示完成；如果 repository 提供相關的測試位置，請為此案例新增或更新覆蓋範圍。

由索引模型根據 Issue 內容生成。