Bubble svelte dev events (#5994)

src/runtime/internal/dev.ts

@@ -2,7 +2,7 @@ import { custom_event, append, insert, detach, listen, attr } from './dom';
 import { SvelteComponent } from './Component';
 
 export function dispatch_dev<T=any>(type: string, detail?: T) {
-	document.dispatchEvent(custom_event(type, { version: '__VERSION__', ...detail }));
+	document.dispatchEvent(custom_event(type, { version: '__VERSION__', ...detail }, true));
 }
 
 export function append_dev(target: Node, node: Node) {

src/runtime/internal/dom.ts

@@ -521,9 +521,9 @@ export function toggle_class(element, name, toggle) {
 	element.classList[toggle ? 'add' : 'remove'](name);
 }
 
-export function custom_event<T=any>(type: string, detail?: T) {
+export function custom_event<T=any>(type: string, detail?: T, bubbles: boolean = false) {
 	const e: CustomEvent<T> = document.createEvent('CustomEvent');
-	e.initCustomEvent(type, false, false, detail);
+	e.initCustomEvent(type, bubbles, false, detail);
 	return e;
 }