chore(grids): strongly type doubletap event for preventDefault call

Due to incompatible signatures (void vs Function) w/ older ts 3.2

Author: damyanpetev

projects/igniteui-angular/src/lib/grids/cell.component.ts

@@ -681,10 +681,10 @@ export class IgxGridCellComponent implements OnInit, OnChanges, OnDestroy {
      * @internal
      */
     @HostListener('dblclick', ['$event'])
-    public onDoubleClick = (event: MouseEvent| HammerInput) => {
+    public onDoubleClick = (event: MouseEvent | HammerInput) => {
         if (event.type === 'doubletap') {
             // prevent double-tap to zoom on iOS
-            event.preventDefault();
+            (event as HammerInput).preventDefault();
         }
         if (this.editable && !this.editMode && !this.row.deleted) {
             this.crudService.begin(this);