Use typeof InquirerSeparator so it has a call signature type

registry/lib/prompts.d.ts

@@ -5,7 +5,7 @@ import inquirerSearch from '@inquirer/search'
 import inquirerSelect, { Separator as InquirerSeparator } from '@inquirer/select'
 
 declare namespace Prompts {
-  export type Separator = InquirerSeparator
+  export type Separator = typeof InquirerSeparator
   export const Separator: Separator
   export const confirm: typeof inquirerConfirm
   export const input: typeof inquirerInput