chore: use ObservableNotification type

src/internal/Subscriber.ts

@@ -1,6 +1,6 @@
 /** @prettier */
 import { isFunction } from './util/isFunction';
-import { Observer, PartialObserver } from './types';
+import { Observer, PartialObserver, ObservableNotification } from './types';
 import { isSubscription, Subscription } from './Subscription';
 import { config } from './config';
 import { reportUnhandledError } from './util/reportUnhandledError';
@@ -199,10 +199,7 @@ function defaultErrorHandler(err: any) {
  * @param notification The notification being sent
  * @param subscriber The stopped subscriber
  */
-function handleStoppedNotification(
-  notification: { kind: 'N'; value: any } | { kind: 'E'; error: any } | { kind: 'C' },
-  subscriber: Subscriber<any>
-) {
+function handleStoppedNotification(notification: ObservableNotification<any>, subscriber: Subscriber<any>) {
   const { onStoppedNotification } = config;
   onStoppedNotification && timeoutProvider.setTimeout(() => onStoppedNotification(notification, subscriber));
 }

src/internal/config.ts

@@ -1,6 +1,6 @@
 /** @prettier */
-
 import { Subscriber } from './Subscriber';
+import { ObservableNotification } from './types';
 
 /**
  * The global configuration object for RxJS, used to configure things
@@ -28,9 +28,7 @@ export const config = {
    * we do not want errors thrown in this user-configured handler to interfere with the
    * behavior of the library.
    */
-  onStoppedNotification: null as
-    | ((notification: { kind: 'N'; value: any } | { kind: 'E'; error: any } | { kind: 'C' }, subscriber: Subscriber<any>) => void)
-    | null,
+  onStoppedNotification: null as ((notification: ObservableNotification<any>, subscriber: Subscriber<any>) => void) | null,
 
   /**
    * The promise constructor used by default for methods such as