I'm trying to figure out how to data-bind an ion-range in ionic v4. The usage guide for v4 is light on info and I keep getting an error that reads, "can't bind to ngmodel since it isn't a known property of ion-range".
Example from ionic v3 documentation
<ion-item>
<ion-range [(ngModel)]="brightness">
<ion-icon range-left small name="sunny"></ion-icon>
<ion-icon range-right name="sunny"></ion-icon>
</ion-range>
</ion-item>