Export all the Event sub class

Actually only some are exported

This is useful to type the received events

src/ol/interaction/Select.js

@@ -94,7 +94,7 @@ const SelectEventType = {
  * Events emitted by {@link module:ol/interaction/Select~Select} instances are instances of
  * this type.
  */
-class SelectEvent extends Event {
+export class SelectEvent extends Event {
   /**
    * @param {SelectEventType} type The event type.
    * @param {Array<import("../Feature.js").default>} selected Selected features.