Add SelectionPos to exported types (#662)

SelectionPos has been added to the list of exported types in types.ts to make it available for use in other modules.

Author: vineethasok

src/components/types.ts

@@ -54,6 +54,7 @@ export type {
   CellProps,
   SelectedRegion,
   SelectionFocus,
+  SelectionPos,
   SelectionAction,
   GridContextMenuItemProps,
   Rectangle,