fix(programmatic): solve close function type mismatch (#1576)

The error occours when building in the files `useModalProgrammatic.ts`,
`useNotificationProgrammatic.ts` and `useSidebarProgrammatic.ts`, which
are all related to a component with a close emit.

- changed type of CloseFunction from `[]` to `unknown[]`

Author: mlmoravek

packages/oruga/src/components/programmatic/ProgrammaticComponent.ts

@@ -38,7 +38,7 @@ export type CloseEventArgs<T extends VNodeTypes> =
 
 /** The ProgrammaticComponent close funtion definition. */
 type CloseFunction<C extends VNodeTypes> = (
-    ...args: CloseEventArgs<C> | []
+    ...args: CloseEventArgs<C> | unknown[]
 ) => void;
 
 export type ProgrammaticComponentEmits<C extends VNodeTypes> = {