define missing Notifications properties for sw

packages/sw/src/@types/global.d.ts

@@ -12,3 +12,31 @@ declare const _VERSION_: string;
 declare const _ENV_: string;
 declare const _DEV_: boolean;
 declare const _PERF_PREFIX_: string;
+
+// Extended to account for TS missing fields: https://github.com/microsoft/TypeScript-DOM-lib-generator/issues/1725
+interface NotificationOptions {
+	/**
+	 * An array of actions to display in the notification, for which the default is an empty array.
+	 * https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/showNotification#actions
+	 */
+	actions?: NotificationAction[];
+
+	/**
+	 * A boolean value specifying whether the user should be notified after a new notification replaces an old one.
+	 * The default is false, which means they won't be notified.
+	 * If true, then tag also must be set.
+	 * https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/showNotification#renotify
+	 */
+	renotify?: boolean;
+}
+
+interface NotificationAction {
+	/** A string identifying a user action to be displayed on the notification. */
+	action: string;
+
+	/** A string containing action text to be shown to the user. */
+	title: string;
+
+	/** A string containing the URL of an icon to display with the action. */
+	icon?: string;
+}