Bump version to 5.0.0-alpha1 (#29925)

Also add v4.5.0 in versions and keep README.md pointing to v4.5.0 so that there are no broken stuff.

README.md

 <p align="center">
   <a href="https://getbootstrap.com/">
-    <img src="https://getbootstrap.com/docs/4.3/assets/brand/bootstrap-solid.svg" alt="Bootstrap logo" width="72" height="72">
+    <img src="https://getbootstrap.com/docs/4.5/assets/brand/bootstrap-solid.svg" alt="Bootstrap logo" width="72" height="72">
   </a>
 </p>
 
@@ -9,7 +9,7 @@
 <p align="center">
   Sleek, intuitive, and powerful front-end framework for faster and easier web development.
   <br>
-  <a href="https://getbootstrap.com/docs/4.3/"><strong>Explore Bootstrap docs »</strong></a>
+  <a href="https://getbootstrap.com/docs/4.5/"><strong>Explore Bootstrap docs »</strong></a>
   <br>
   <br>
   <a href="https://github.com/twbs/bootstrap/issues/new?template=bug.md">Report bug</a>
@@ -41,14 +41,14 @@
 
 Several quick start options are available:
 
-- [Download the latest release.](https://github.com/twbs/bootstrap/archive/v4.3.1.zip)
+- [Download the latest release.](https://github.com/twbs/bootstrap/archive/v4.5.0.zip)
 - Clone the repo: `git clone https://github.com/twbs/bootstrap.git`
 - Install with [npm](https://www.npmjs.com/): `npm install bootstrap`
-- Install with [yarn](https://yarnpkg.com/): `yarn add bootstrap@4.3.1`
-- Install with [Composer](https://getcomposer.org/): `composer require twbs/bootstrap:4.3.1`
+- Install with [yarn](https://yarnpkg.com/): `yarn add bootstrap@4.5.0`
+- Install with [Composer](https://getcomposer.org/): `composer require twbs/bootstrap:4.5.0`
 - Install with [NuGet](https://www.nuget.org/): CSS: `Install-Package bootstrap` Sass: `Install-Package bootstrap.sass`
 
-Read the [Getting started page](https://getbootstrap.com/docs/4.3/getting-started/introduction/) for information on the framework contents, templates and examples, and more.
+Read the [Getting started page](https://getbootstrap.com/docs/4.5/getting-started/introduction/) for information on the framework contents, templates and examples, and more.
 
 
 ## Status

config.yml

@@ -25,7 +25,7 @@ publishDir:             "_gh_pages"
 module:
   mounts:
     - source:           dist
-      target:           static/docs/4.3/dist
+      target:           static/docs/5.0/dist
     - source:           site/assets
       target:           assets
     - source:           site/content
@@ -36,21 +36,21 @@ module:
       target:           layouts
     - source:           site/static
       target:           static
-    - source:           site/static/docs/4.3/assets/img/favicons/apple-touch-icon.png
+    - source:           site/static/docs/5.0/assets/img/favicons/apple-touch-icon.png
       target:           static/apple-touch-icon.png
-    - source:           site/static/docs/4.3/assets/img/favicons/favicon.ico
+    - source:           site/static/docs/5.0/assets/img/favicons/favicon.ico
       target:           static/favicon.ico
 
 params:
   description:          "The most popular HTML, CSS, and JS library in the world."
   authors:              "Mark Otto, Jacob Thornton, and Bootstrap contributors"
-  social_image_path:    /docs/4.3/assets/brand/bootstrap-social.png
-  social_logo_path:     /docs/4.3/assets/brand/bootstrap-social-logo.png
+  social_image_path:    /docs/5.0/assets/brand/bootstrap-social.png
+  social_logo_path:     /docs/5.0/assets/brand/bootstrap-social-logo.png
 
-  current_version:      "4.3.1"
-  current_ruby_version: "4.3.1"
+  current_version:      "5.0.0-alpha1"
+  current_ruby_version: "5.0.0-alpha1"
+  docs_version:         "5.0"
   rfs_version:          "9.0.2"
-  docs_version:         "4.3"
   github_org:           "https://github.com/twbs"
   repo:                 "https://github.com/twbs/bootstrap"
   twitter:              "getbootstrap"
@@ -62,17 +62,17 @@ params:
   icons:                "https://icons.getbootstrap.com/"
 
   download:
-    source:             "https://github.com/twbs/bootstrap/archive/v4.3.1.zip"
-    dist:               "https://github.com/twbs/bootstrap/releases/download/v4.3.1/bootstrap-4.3.1-dist.zip"
-    dist_examples:      "https://github.com/twbs/bootstrap/releases/download/v4.3.1/bootstrap-4.3.1-examples.zip"
+    source:             "https://github.com/twbs/bootstrap/archive/v5.0.0-alpha1.zip"
+    dist:               "https://github.com/twbs/bootstrap/releases/download/v5.0.0-alpha1/bootstrap-5.0.0-alpha1-dist.zip"
+    dist_examples:      "https://github.com/twbs/bootstrap/releases/download/v5.0.0-alpha1/bootstrap-5.0.0-alpha1-examples.zip"
 
   cdn:
     # See https://www.srihash.org for info on how to generate the hashes
-    css:              "https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
-    css_hash:         "sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
-    js:               "https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
-    js_hash:          "sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
-    js_bundle:        "https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.bundle.min.js"
-    js_bundle_hash:   "sha384-xrRywqdh3PHs8keKZN+8zzc5TX0GRTLCcmivcbNJWm2rs5C8PRhcEn3czEjhAO9o"
+    css:              "https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/css/bootstrap.min.css"
+    css_hash:         "sha384-j6A7bHxDBHFP/fFU0tDYWO5rC0fHU73OIMyfXyWjUP7LjULfhY6sXSyWLgIuop+J"
+    js:               "https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/js/bootstrap.min.js"
+    js_hash:          "sha384-3HDYci1RjYapKWcHOlx69VoYNavBQG79CDT/WLM9FTVQp1TpM5cBd8XlCEhumbsq"
+    js_bundle:        "https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/js/bootstrap.bundle.min.js"
+    js_bundle_hash:   "sha384-E7NTjoTX5oFTbvRPPC4hH5dHD+I3L/DVPjIc1vJs1HaLyTPrBXCbRL2nJDdGJOV/"
     popper:           "https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
     popper_hash:      "sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"

dist/css/bootstrap-grid.css

 /*!
- * Bootstrap Grid v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Grid v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap-grid.min.css

 /*!
- * Bootstrap Grid v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Grid v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap-reboot.css

 /*!
- * Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Reboot v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap-reboot.min.css

 /*!
- * Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Reboot v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap-utilities.css

 /*!
- * Bootstrap Utilities v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Utilities v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap-utilities.min.css

 /*!
- * Bootstrap Utilities v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap Utilities v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap.css

 /*!
- * Bootstrap v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/css/bootstrap.min.css

 /*!
- * Bootstrap v4.3.1 (https://getbootstrap.com/)
+ * Bootstrap v5.0.0-alpha1 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors
  * Copyright 2011-2020 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

dist/js/bootstrap.bundle.js

 /*!
-  * Bootstrap v4.3.1 (https://getbootstrap.com/)
+  * Bootstrap v5.0.0-alpha1 (https://getbootstrap.com/)
   * Copyright 2011-2020 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   */
@@ -82,7 +82,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): util/index.js
+   * Bootstrap (v5.0.0-alpha1): util/index.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -257,7 +257,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): dom/data.js
+   * Bootstrap (v5.0.0-alpha1): dom/data.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -396,7 +396,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): dom/event-handler.js
+   * Bootstrap (v5.0.0-alpha1): dom/event-handler.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -680,7 +680,7 @@
    */
 
   var NAME = 'alert';
-  var VERSION = '4.3.1';
+  var VERSION = '5.0.0-alpha1';
   var DATA_KEY = 'bs.alert';
   var EVENT_KEY = "." + DATA_KEY;
   var DATA_API_KEY = '.data-api';
@@ -835,7 +835,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): dom/selector-engine.js
+   * Bootstrap (v5.0.0-alpha1): dom/selector-engine.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -924,7 +924,7 @@
    */
 
   var NAME$1 = 'button';
-  var VERSION$1 = '4.3.1';
+  var VERSION$1 = '5.0.0-alpha1';
   var DATA_KEY$1 = 'bs.button';
   var EVENT_KEY$1 = "." + DATA_KEY$1;
   var DATA_API_KEY$1 = '.data-api';
@@ -1086,7 +1086,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): dom/manipulator.js
+   * Bootstrap (v5.0.0-alpha1): dom/manipulator.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -1171,7 +1171,7 @@
    */
 
   var NAME$2 = 'carousel';
-  var VERSION$2 = '4.3.1';
+  var VERSION$2 = '5.0.0-alpha1';
   var DATA_KEY$2 = 'bs.carousel';
   var EVENT_KEY$2 = "." + DATA_KEY$2;
   var DATA_API_KEY$2 = '.data-api';
@@ -1768,7 +1768,7 @@
    */
 
   var NAME$3 = 'collapse';
-  var VERSION$3 = '4.3.1';
+  var VERSION$3 = '5.0.0-alpha1';
   var DATA_KEY$3 = 'bs.collapse';
   var EVENT_KEY$3 = "." + DATA_KEY$3;
   var DATA_API_KEY$3 = '.data-api';
@@ -4785,7 +4785,7 @@
    */
 
   var NAME$4 = 'dropdown';
-  var VERSION$4 = '4.3.1';
+  var VERSION$4 = '5.0.0-alpha1';
   var DATA_KEY$4 = 'bs.dropdown';
   var EVENT_KEY$4 = "." + DATA_KEY$4;
   var DATA_API_KEY$4 = '.data-api';
@@ -5291,7 +5291,7 @@
    */
 
   var NAME$5 = 'modal';
-  var VERSION$5 = '4.3.1';
+  var VERSION$5 = '5.0.0-alpha1';
   var DATA_KEY$5 = 'bs.modal';
   var EVENT_KEY$5 = "." + DATA_KEY$5;
   var DATA_API_KEY$5 = '.data-api';
@@ -5897,7 +5897,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): util/sanitizer.js
+   * Bootstrap (v5.0.0-alpha1): util/sanitizer.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -6029,7 +6029,7 @@
    */
 
   var NAME$6 = 'tooltip';
-  var VERSION$6 = '4.3.1';
+  var VERSION$6 = '5.0.0-alpha1';
   var DATA_KEY$6 = 'bs.tooltip';
   var EVENT_KEY$6 = "." + DATA_KEY$6;
   var CLASS_PREFIX = 'bs-tooltip';
@@ -6779,7 +6779,7 @@
    */
 
   var NAME$7 = 'popover';
-  var VERSION$7 = '4.3.1';
+  var VERSION$7 = '5.0.0-alpha1';
   var DATA_KEY$7 = 'bs.popover';
   var EVENT_KEY$7 = "." + DATA_KEY$7;
   var CLASS_PREFIX$1 = 'bs-popover';
@@ -6967,7 +6967,7 @@
    */
 
   var NAME$8 = 'scrollspy';
-  var VERSION$8 = '4.3.1';
+  var VERSION$8 = '5.0.0-alpha1';
   var DATA_KEY$8 = 'bs.scrollspy';
   var EVENT_KEY$8 = "." + DATA_KEY$8;
   var DATA_API_KEY$6 = '.data-api';
@@ -7270,7 +7270,7 @@
    */
 
   var NAME$9 = 'tab';
-  var VERSION$9 = '4.3.1';
+  var VERSION$9 = '5.0.0-alpha1';
   var DATA_KEY$9 = 'bs.tab';
   var EVENT_KEY$9 = "." + DATA_KEY$9;
   var DATA_API_KEY$7 = '.data-api';
@@ -7497,7 +7497,7 @@
    */
 
   var NAME$a = 'toast';
-  var VERSION$a = '4.3.1';
+  var VERSION$a = '5.0.0-alpha1';
   var DATA_KEY$a = 'bs.toast';
   var EVENT_KEY$a = "." + DATA_KEY$a;
   var EVENT_CLICK_DISMISS$1 = "click.dismiss" + EVENT_KEY$a;
@@ -7710,7 +7710,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.3.1): index.umd.js
+   * Bootstrap (v5.0.0-alpha1): index.umd.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */