* @babel/cli                   ^7.15.4  →  ^7.15.7
* @rollup/plugin-node-resolve  ^13.0.4  →  ^13.0.5
* autoprefixer                 ^10.3.4  →  ^10.3.6
* glob                          ^7.1.7  →   ^7.2.0
* nodemon                      ^2.0.12  →  ^2.0.13
* postcss                       ^8.3.6  →   ^8.3.8
* postcss-cli                   ^8.3.1  →   ^9.0.0
* qunit                        ^2.17.1  →  ^2.17.2
* rollup                       ^2.56.3  →  ^2.57.0

Use `assert.strictEqual`/`assert.true`/`assert.false`

* @babel/cli                   ^7.14.8  →  ^7.15.5
* @babel/core                  ^7.14.8  →  ^7.15.4
* @babel/preset-env            ^7.14.8  →  ^7.15.6
* @rollup/plugin-commonjs      ^19.0.1  →  ^20.0.0
* @rollup/plugin-node-resolve  ^13.0.2  →  ^13.0.4
* autoprefixer                 ^10.3.1  →  ^10.3.4
* clean-css-cli                 ^5.3.0  →   ^5.3.3
* eslint                       ^7.31.0  →  ^7.32.0
* eslint-config-xo             ^0.37.0  →  ^0.38.0
* eslint-plugin-import         ^2.23.4  →  ^2.24.2
* eslint-plugin-unicorn        ^34.0.1  →  ^36.0.0
* hugo-bin                     ^0.74.0  →  ^0.76.1
* qunit                        ^2.16.0  →  ^2.17.1
* postcss                       ^8.3.5  →   ^8.3.6
* rollup                       ^2.53.3  →  ^2.56.3
* vnu-jar                      21.6.11  →   21.9.2

Update a URL mentioning dead name

manual backport of #34886

per https://www.w3.org/TR/html-aria/#docconformance

> It is NOT RECOMMENDED to use `aria-disabled="true"` on an `a` element with an `href` attribute.
>
>NOTE
>If a link needs to be "disabled", remove the `href` attribute.

This PR removes the unnecessary `href="#"`, `tabindex="-1"`, and `aria-disabled="true"` from disabled links in both docs pages and examples. `aria-disabled="true"` *is* kept for disabled link-based buttons (that have `role="button"`) as there it's appropriate to use (you *want* to convey to assistive technologies that this thing you're claiming is a button is also disabled at the moment)

Further, the PR extends the "Link functionality caveat" to show the "proper" way (removing `href` and adding `.disabled` class only) to disable a link, but then explains what to do if that's not possible (and then keeps an example with all the traditional `href="#" tabindex="-1" aria-disabled="true"`, but explains clearly that it's not ideal). Same sort of explanation is also added to the pointer event utilities page

Fixes #34353

.

Co-Authored-By: Slaven Tomac <slaventomac@gmail.com>

In case of a modal with fading enabled, a prevented show event can cause show to not showing the modal anymore.

See #34055



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

* @babel/cli                       ^7.14.3  →  ^7.14.8
* @babel/core                      ^7.14.3  →  ^7.14.8
* @babel/preset-env                ^7.14.2  →  ^7.14.8
* @rollup/plugin-commonjs          ^19.0.0  →  ^19.0.1
* @rollup/plugin-node-resolve      ^13.0.0  →  ^13.0.2
* autoprefixer                     ^10.2.5  →  ^10.3.1
* eslint                           ^7.26.0  →  ^7.31.0
* eslint-config-xo                 ^0.36.0  →  ^0.37.0
* eslint-plugin-import             ^2.23.2  →  ^2.23.4
* eslint-plugin-unicorn            ^31.0.0  →  ^34.0.1
* globby                           ^11.0.3  →  ^11.0.4
* hugo-bin                         ^0.71.1  →  ^0.73.0
* karma                             ^6.3.2  →   ^6.3.4
* karma-firefox-launcher            ^2.1.0  →   ^2.1.1
* linkinator                       ^2.13.6  →  ^2.14.0
* nodemon                           ^2.0.7  →   ^2.0.12
* node-sass                         ^6.0.0  →   ^6.0.1
* postcss                           ^8.3.0  →   ^8.3.5
* qunit                            ^2.15.0  →  ^2.16.0
* rollup                           ^2.48.0  →  ^2.53.3
* stylelint-config-twbs-bootstrap   ^2.2.0  →   ^2.2.3
* vnu-jar                           21.4.9  →  21.6.11

Bumps [coverallsapp/github-action](https://github.com/coverallsapp/github-action) from 1.1.2 to 1.1.3.
- [Release notes](https://github.com/coverallsapp/github-action/releases)
- [Commits](https://github.com/coverallsapp/github-action/compare/v1.1.2...1.1.3

)

---
updated-dependencies:
- dependency-name: coverallsapp/github-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Remove unneeded `.text-white-50` CSS rule

This is already part of Bootstrap 4.6 and 5.0.

Improve and clean up vnu-jar.js

The `thead` rule is safe to remove -- it was a workaround for browsers that didn't conform to this part of the CSS 2.1 spec. (https://www.w3.org/TR/CSS21/tables.html#table-display)
In practice, this meant IE 6 & IE 7.

(thanks to @mattbrundage for this PR upstream for the main.css project (https://github.com/h5bp/main.css/pull/101)

*  Enable `0.x` with negative margins @ v4

I set it as below, but no negative margin was added.
`$spacers: (0\.5: ($spacer * .125));`

After investigating, it seems that `0 \ .5` is also evaluated as 0.
So I changed it to string comparison.

HTML example: `<img class="mt-n0.5">`

*  Clear CI errors

Closes #34146 

---

Not sure what happened but indeed, [our current `$secondary` is not what's shown in docs](https://github.com/twbs/bootstrap/blob/c2f949c1fdad09e30793b533e5502808c5e2d423/scss/_variables.scss#L68).

* @babel/cli                       ^7.13.14  →   ^7.14.3
* @babel/core                       ^7.14.0  →   ^7.14.3
* @babel/preset-env                 ^7.14.1  →   ^7.14.2
* @rollup/plugin-commonjs           ^18.0.0  →   ^19.0.0
* @rollup/plugin-node-resolve       ^11.2.1  →   ^13.0.0
* clean-css-cli                      ^5.2.2  →    ^5.3.0
* eslint                            ^7.23.0  →   ^7.26.0
* eslint-config-xo                  ^0.35.0  →   ^0.36.0
* eslint-plugin-import              ^2.22.1  →   ^2.23.2
* eslint-plugin-unicorn             ^29.0.0  →   ^31.0.0
* glob                               ^7.1.6  →    ^7.1.7
* hugo-bin                          ^0.70.0  →   ^0.71.1
* node-sass                          ^5.0.0  →    ^6.0.0
* postcss                            ^8.2.9  →    ^8.3.0
* qunit                             ^2.14.1  →   ^2.15.0
* rollup                            ^2.44.0  →   ^2.48.0
* stylelint                        ^13.12.0  →  ^13.13.1
* stylelint-config-twbs-bootstrap    ^2.1.0  →    ^2.2.0
* vnu-jar                            21.2.5  →    21.4.9