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.

首先在 21.0.0-rc.0 上重现 collectionData 示例，然后检查 onSnapshot 处理程序及其向 Query 的转换。当 collection subscription 不再针对 CollectionReference 引发 FirebaseError 时，即视为完成；如果 repository 提供相关的测试位置，请为此用例添加或更新覆盖范围。

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