Copy iOS 11 Clustering

[efremidze]

Add option to cluster like iOS 11

https://developer.apple.com/documentation/mapkit/mkmapviewdelegate/2867923-mapview

extension MapKitViewController: ClusterDelegate {
    
    func mapView(_ mapView: MKMapView, clusterAnnotationForMemberAnnotations memberAnnotations: [MKAnnotation]) -> ClusterAnnotation {
        let annotation = ClusterAnnotation(memberAnnotations: memberAnnotations)
        annotation.title = "Emojis"
        return annotation
    }

}

[kylebrowning]

What exactly does this do?

[efremidze]

Adds iOS 11 syntax for clustering.