Add changeset

.changeset/shaggy-kings-add.md

@@ -0,0 +1,23 @@
+---
+'xstate': patch
+---
+
+Ensure that "stop" transitions are called in machines:
+
+```ts
+const machine = createMachine({
+  on: {
+    'xstate.stop': {
+      actions: () => {
+        // do cleanup, etc...
+        console.log('Machine actor was just stopped');
+      }
+    }
+  }
+});
+
+const actor = createActor(machine).start();
+
+actor.stop();
+// Logs "Machine actor was just stopped"
+```