- add `sr-only` "Bootstrap", which will be part of the accessible name
- extra `sr-only` text to give some context - that the dropdown is about switching versions
- remove the redundant id/aria-labelledby for the dropdown
- change the control from `<a>` to `<button>`

v4 Docs: Update outdated ARIA/PF link, expand color contrast explanation in `accessibility.md` (#36492)

PF link is backport of https://github.com/twbs/bootstrap/pull/36489
change in `accessibility.md` is to bring this in line with existing v5 prose

v4 port of https://github.com/twbs/bootstrap/pull/36487

* Manually backport 32630

Dynamic tabs: use buttons rather than links

* Tweak unit test

* Tweak unit tests

* More tweakage

* show() should also bail if `disabled` attribute is set

* Tweak tests

* Simplify test for relatedTarget

* Temporarily remove problematic test

(as i can't get local tests to run just noww)

* Revert previous

* test: fix broken test cases for tab.js

* test: fix role=tablist invalid on nav element

* test: prefer <div/> over <div></div>

* Manually backport 32630

Dynamic tabs: use buttons rather than links

* test: fix broken test cases for tab.js

* Fixes

* Remove and ignore lock file

Co-authored-by: alpadev <alpa.muc@gmail.com>
Co-authored-by: Mark Otto <markd.otto@gmail.com>
Co-authored-by: Mark Otto <markdotto@gmail.com>

* Move linkinator to GitHub Actions.

* Remove `docs-linkinator` npm script since it's no longer used

This is a backport from BS5 to BS4.

As per https://github.com/twbs/bootstrap/issues/35553

The ```small-font -size``` will actually increase from ```13px``` to ```14px``` with this proposed change. Personally I'd prefer keeping it the BS5 way (```14px```), as the text is more readable now.

If it's needed, I can do another PR with the ```$small-font-size:             .8125rem !default;``` to resemble BS4 more closely but I feel like this would be a move forward even for BS4.

* @babel/cli                       ^7.16.0  →  ^7.16.7
* @babel/core                      ^7.16.5  →  ^7.16.7
* @babel/preset-env                ^7.16.5  →  ^7.16.7
* @rollup/plugin-node-resolve      ^13.1.1  →  ^13.1.2
* autoprefixer                     ^10.4.0  →  ^10.4.1
* eslint                            ^8.4.1  →   ^8.6.0
* eslint-plugin-import             ^2.25.3  →  ^2.25.4
* eslint-plugin-qunit               ^7.1.0  →   ^7.2.0
* eslint-plugin-unicorn            ^39.0.0  →  ^40.0.0
* hugo-bin                         ^0.78.1  →  ^0.79.2
* linkinator                       ^2.16.2  →   ^3.0.3
* node-sass                         ^7.0.0  →   ^7.0.1
* rollup                           ^2.61.1  →  ^2.63.0
* stylelint                        ^14.1.0  →  ^14.2.0
* stylelint-config-twbs-bootstrap   ^3.0.0  →   ^3.0.1

Also, remove the unused glob package.

following on from https://github.com/twbs/bootstrap/pull/35213 this

- expands the note, making it clear it's not supported
- makes it a callout

- a few rewordings/tweaks
- add info about toasts with focusable/actionable controls (shouldn't autohide them)

manual backport of https://github.com/twbs/bootstrap/pull/33810

* Use param to set Bootstrap version in Contents doc

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Co-authored-by: Mark Otto <markd.otto@gmail.com>

Manual backport of https://github.com/twbs/bootstrap/pull/33797

* Bump version to v4.6.1

* Dist

Co-authored-by: XhmikosR <xhmikosr@gmail.com>