From 2b638a54b991a77a4bc218ea3737212d6deb2fce Mon Sep 17 00:00:00 2001
From: Robin Munn <rmunn@pobox.com>
Date: Mon, 27 Sep 2021 08:27:06 +0700
Subject: [PATCH] StartStopNotifier type now requires update param

This will be a breaking change for anyone who uses the StartStopNotifier
type in their custom stores.
---
 src/runtime/store/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/runtime/store/index.ts b/src/runtime/store/index.ts
index afd4ccabd61e..a38f05616f2d 100644
--- a/src/runtime/store/index.ts
+++ b/src/runtime/store/index.ts
@@ -13,7 +13,7 @@ export type Updater<T> = (value: T) => T;
 type Invalidator<T> = (value?: T) => void;
 
 /** Start and stop notification callbacks. */
-export type StartStopNotifier<T> = (set: Subscriber<T>, update?: (fn: Updater<T>) => void) => Unsubscriber | void;
+export type StartStopNotifier<T> = (set: Subscriber<T>, update: (fn: Updater<T>) => void) => Unsubscriber | void;
 
 /** Readable interface for subscribing. */
 export interface Readable<T> {