From 9dfcb07717fbb7e1f7c699fa1eed68aca754dd0a Mon Sep 17 00:00:00 2001
From: Greg Veres <greg.veres@rogers.com>
Date: Wed, 15 Apr 2020 11:04:04 -0400
Subject: [PATCH] fixed incorrect definition of locale in typescript

the first parameter of locale is optional so that locale() can be called with no arguments to return the current locale.
I would have added a test case to prove this works, but everything is in javascript and I expect you would not appreciate adding typescript to the unit tests.
---
 types/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/index.d.ts b/types/index.d.ts
index f971394dd..1f58a9ccb 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -100,7 +100,7 @@ declare namespace dayjs {
 
   export function extend<T = unknown>(plugin: PluginFunc<T>, option?: T): Dayjs
 
-  export function locale(preset: string | ILocale, object?: Partial<ILocale>, isLocal?: boolean): string
+  export function locale(preset?: string | ILocale, object?: Partial<ILocale>, isLocal?: boolean): string
 
   export function isDayjs(d: any): d is Dayjs