Added sl-request-close event

src/events/events.ts

@@ -6,3 +6,4 @@ export { default as SlSelectionChangeEvent } from './sl-selection-change';
 export { default as SlTabHideEvent } from './sl-tab-hide';
 export { default as SlTabShowEvent } from './sl-tab-show';
 export { default as SlErrorEvent } from './sl-error';
+export { default as SlRequestCloseEvent } from './sl-request-close';

src/events/sl-request-close.ts

@@ -0,0 +1,9 @@
+type SlRequestCloseEvent = CustomEvent<{ source: 'close-button' | 'keyboard' | 'overlay' }>;
+
+declare global {
+  interface GlobalEventHandlersEventMap {
+    'sl-request-close': SlRequestCloseEvent;
+  }
+}
+
+export default SlRequestCloseEvent;