chore: fix Invalidator type

Author: Rich-Harris

packages/svelte/src/store/index.js

@@ -74,7 +74,7 @@ export function writable(value, start = noop) {
 
 	/**
 	 * @param {Subscriber<T>} run
-	 * @param {Invalidator<T>} [invalidate]
+	 * @param {Invalidator} [invalidate]
 	 * @returns {Unsubscriber}
 	 */
 	function subscribe(run, invalidate = noop) {

packages/svelte/src/store/private.d.ts

@@ -1,10 +1,10 @@
 import { Readable, Subscriber } from './public.js';
 
 /** Cleanup logic callback. */
-type Invalidator<T> = (value?: T) => void;
+type Invalidator = () => void;
 
 /** Pair of subscriber and invalidator. */
-type SubscribeInvalidateTuple<T> = [Subscriber<T>, Invalidator<T>];
+type SubscribeInvalidateTuple<T> = [Subscriber<T>, Invalidator];
 
 /** One or more `Readable`s. */
 type Stores = Readable<any> | [Readable<any>, ...Array<Readable<any>>] | Array<Readable<any>>;

packages/svelte/src/store/public.d.ts

@@ -30,7 +30,7 @@ interface Readable<T> {
 	 * @param run subscription callback
 	 * @param invalidate cleanup callback
 	 */
-	subscribe(this: void, run: Subscriber<T>, invalidate?: Invalidator<T>): Unsubscriber;
+	subscribe(this: void, run: Subscriber<T>, invalidate?: Invalidator): Unsubscriber;
 }
 
 /** Writable interface for both updating and subscribing. */