Improve API compatibility with React's useSyncExternalStore

[SandroMaglione]

#460

So that we know when to update cache

[zxch3n]

It sounds useful. It shouldn't negatively affect performance either. We'll try to add it in v1.0.

For your current work, another approach is to check events to determine if the list value has changed. If it hasn't changed, you can use the previous cache.