add

node_modules/dayjs/esm/plugin/updateLocale/index.d.ts

@@ -0,0 +1,8 @@
+import { PluginFunc } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin
+
+declare module 'dayjs/esm' {
+  export function updateLocale(localeName: string, customConfig: Record<string, unknown>): Record<string, unknown>
+}