Clustered markers do not spiderfy when clicked.

[edwardgaoyb]

Sometimes clustered markers do not spiderfy when clicked.

The root cause is that each cluster has a property, "maxExpansionZoom". This property is compared to the current map zoom level to decide when the cluster will expand, i.e. not a cluster anymore.
In the _handleClick() function of GeoJSON component, it is compared to the maxZoom property of SuperClusterOptions.