chore: update version

Author: mrholek

js/src/base-component.js

@@ -17,7 +17,7 @@ import { executeAfterTransition, getElement } from './util/index.js'
  * Constants
  */
 
-const VERSION = '5.0.0-alpha.1'
+const VERSION = '4.2.6'
 
 /**
  * Class definition

scss/mixins/_banner.scss

@@ -1,6 +1,6 @@
 @mixin bsBanner($file) {
   /*!
-   * CoreUI #{$file} v5.0.0-alpha.1 (https://coreui.io)
+   * CoreUI #{$file} v4.2.6 (https://coreui.io)
    * Copyright (c) 2023 creativeLabs Łukasz Holeczek
    * Licensed under MIT (https://github.com/coreui/coreui/blob/main/LICENSE)
    */