Add changeset

.changeset/tasty-ravens-prove.md

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+---
+'@xstate/store': minor
+---
+
+The store now extends EventTarget, allowing for native DOM event handling capabilities while maintaining the existing `.on()` API. This change:
+
+- Adds support for standard `.addEventListener(…)` and `.removeEventListener(…)` methods
+- Simplifies internal event handling by leveraging native `EventTarget` functionality
+- Maintains full backwards compatibility with existing `.on(…)` method
+
+```ts
+// ...
+store.addEventListener('incremented', (event) => {
+  console.log(event.detail);
+});
+```