[shared-notification-delegate] delegateUniqueKey vs. observerUniqueKey

[jessorlisa]

The plugin's README.md mentions a delegateUniqueKey, but it should be observerUniqueKey:

plugins/packages/shared-notification-delegate/index.d.ts

Lines 2 to 7 in a785b94

	export interface DelegateObserver {
	userNotificationCenterDidReceiveNotificationResponseWithCompletionHandler?(center: any /* UNUserNotificationCenter */, response: any /* UNNotificationResponse */, completionHandler: () => void, next: () => void): void;
	userNotificationCenterOpenSettingsForNotification?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, stop: () => void, next: () => void): void;
	userNotificationCenterWillPresentNotificationWithCompletionHandler?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, completionHandler: (p1: any /* UNNotificationPresentationOptions */) => void, next: () => void): void;
	observerUniqueKey?: any;
	}

The v8 documentation also states the wrong key.