docs(contrasts): move content after rebasing master

Code simplification

feat(color-contrast): set min-contrast-ratio as an argument

docs(theming): display contrast ratios in color swatches

docs(colors): better color utilities pairing to ensure sufficient contrast

feat(color-contrast): ensure we return a contrasted enough color (light-first), the most contrasted one otherwise

Fix gradient on switch checkbox (#30868)

Bump lockfile-lint from 4.3.4 to 4.3.6 (#30864)

Bumps [lockfile-lint](https://github.com/lirantal/lockfile-lint) from 4.3.4 to 4.3.6.
- [Release notes](https://github.com/lirantal/lockfile-lint/releases)
- [Commits](https://github.com/lirantal/lockfile-lint/compare/lockfile-lint@4.3.4...lockfile-lint@4.3.6)

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Bump autoprefixer from 9.7.6 to 9.8.0 (#30863)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.7.6 to 9.8.0.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/9.7.6...9.8.0)

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Bump stylelint from 13.3.3 to 13.5.0 (#30862)

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.3.3 to 13.5.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stylelint/stylelint/compare/13.3.3...13.5.0)

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Bump rollup from 2.10.0 to 2.10.4 (#30860)

Bumps [rollup](https://github.com/rollup/rollup) from 2.10.0 to 2.10.4.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.10.0...v2.10.4)

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Bump karma from 5.0.5 to 5.0.8 (#30859)

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.5 to 5.0.8.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v5.0.5...v5.0.8)

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Bump nodemon from 2.0.3 to 2.0.4 (#30858)

Bumps [nodemon](https://github.com/remy/nodemon) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/remy/nodemon/releases)
- [Commits](https://github.com/remy/nodemon/compare/v2.0.3...v2.0.4)

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Bump hugo-bin from 0.58.0 to 0.59.0 (#30857)

Bumps [hugo-bin](https://github.com/fenneclab/hugo-bin) from 0.58.0 to 0.59.0.
- [Release notes](https://github.com/fenneclab/hugo-bin/releases)
- [Commits](https://github.com/fenneclab/hugo-bin/compare/v0.58.0...v0.59.0)

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Bump terser from 4.6.13 to 4.7.0 (#30856)

Bumps [terser](https://github.com/terser/terser) from 4.6.13 to 4.7.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.6.13...v4.7.0)

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Streamline application.js exampleModal code (#30819)

* use `textContent` since we only need to add text
* move comments

More Markdownlint fixes

Fix some easy Markdown linting issues

- Always use dashes for bullets
- Add some basic alt text for our readme OC sponsors

Prevent conflicts with components with classes (#30830)

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

v5: Add border-radius to .card-img-overlay (#30817)

Allows use of background-color and more. Fixes #29033 for v5.

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

migration.md: a few grammar fixes

Improve gradients

- Use a semitransparent gradient from light to dark which works on any background-color
- Store the gradient as a custom property (--bs-gradient)
- Remove `.bg-gradient-*` variants in favour of `.bg-gradient` which works even when `$enable-gradients` are enabled
- Add gradients to navbar, active page links and badges when gradients are enabled

v5: Update color on custom switch focus state

Replaces a custom hsla() value (dunno what I was thinking when I added this) with a reassigned existing variable. This variable goes up the stack and attaches to the component-active-bg variable, derived from our primary color out of the box. Fixes #30646.

Simplify list-group borders in cards (#30808)

Split table cell padding variables (#30815)

Fix broken anchors. (#30828)

Replace double tilde with `Math.floor` (#30691)

Nowadays, browser engines have improved a lot and `Math.floor` is the same, if not faster.
Also, clarity is better than micro-optimizations in this case.

Update devDependencies (#30807)

* eslint                        ^6.8.0  →   ^7.0.0
* eslint-plugin-unicorn        ^19.0.1  →  ^20.0.0
* karma-jasmine-html-reporter   ^1.5.3  →   ^1.5.4
* lockfile-lint                 ^4.2.2  →   ^4.3.4
* rollup                        ^2.9.1  →  ^2.10.0

Update punctuation (#30757)

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

Partially Revert "Use regex.test() when we want to check for a Boolean. (#29969)" (#30770)

This partially reverts commit 9c2b9ac74d4abb5ec8b7864054315de3409d5f3a.

capital at start of sentence (#30804)

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

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.

Dist (#30694)

Fix .browserslistrc file name in docs (#30800)

Bump hugo-bin from 0.57.2 to 0.58.0 (#30787)

Bumps [hugo-bin](https://github.com/fenneclab/hugo-bin) from 0.57.2 to 0.58.0.
- [Release notes](https://github.com/fenneclab/hugo-bin/releases)
- [Commits](https://github.com/fenneclab/hugo-bin/compare/v0.57.2...v0.58.0)

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Bump rollup from 2.8.0 to 2.9.1 (#30789)

Bumps [rollup](https://github.com/rollup/rollup) from 2.8.0 to 2.9.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.8.0...v2.9.1)

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Bump bundlewatch from 0.2.6 to 0.2.7 (#30785)

Bumps [bundlewatch](https://github.com/bundlewatch/bundlewatch) from 0.2.6 to 0.2.7.
- [Release notes](https://github.com/bundlewatch/bundlewatch/releases)
- [Commits](https://github.com/bundlewatch/bundlewatch/compare/v0.2.6...v0.2.7)

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Bump karma from 5.0.4 to 5.0.5 (#30786)

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.4 to 5.0.5.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v5.0.4...v5.0.5)

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Bump linkinator from 2.1.0 to 2.1.1 (#30788)

Bumps [linkinator](https://github.com/JustinBeckwith/linkinator) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/JustinBeckwith/linkinator/releases)
- [Commits](https://github.com/JustinBeckwith/linkinator/compare/v2.1.0...v2.1.1)

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style: removes space (#30782)

coverage: ignore node_modules

Bump karma-coverage-istanbul-reporter from 2.1.1 to 3.0.2

Bumps [karma-coverage-istanbul-reporter](https://github.com/mattlewis92/karma-coverage-istanbul-reporter) from 2.1.1 to 3.0.2.
- [Release notes](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/releases)
- [Changelog](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.1.1...v3.0.2)

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Add a test about the scrollbar issue on non-integer width

Avoid bad scrollbar replacement into width values

Update codeql.yml (#30777)

Remove moot fail-fast option

Improve build/zip-examples.js (#30759)

* remove favicons meta tags
* copy the two brand images we use in the examples
* opy dist and brand images into an assets folder

Add missing closing `div` tags (#30775)

Missed those in 967e607

Removed role="document" from the modal dialog (#30755)

package.json: reuse the existent karma script (#30758)

README.md: change Tests badge to point to master (#30765)

Add a param shortcode to work around the escaped characters in hashes

Use `safeHTMLAttr` in the `integrity` attributes.

Revert "Avoid bad scrollbar replacement into width values (#30690)"

This reverts commit 85c4788dedfdec7d681829e3a52ada0c33f8fa8e.

Update rollup to v2.8.0 and regenerate package-lock.json (#30749)

tests: streamline HTML end tags (#30648)

Fix typo (#30745) (#30746)

Use possessive form of it

(cherry picked from commit d63b651f3708e878814d4c98dd85a759f80fefc4)

Co-authored-by: Quy <quy@fluxbb.org>

add unit tests to ensure our plugins works in jquery

ensure build plugins can exit in error (#30744)

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

enforce element check on scrollspy target (#30747)

BrowserStack: test Edge 16 too (#30725)

build-plugins.js: add missing shebang (#30743)

Regenerate package-lock.json (#30741)

Fix form file height (#30699)

Bump @babel/plugin-proposal-object-rest-spread from 7.9.5 to 7.9.6 (#30737)

Bumps [@babel/plugin-proposal-object-rest-spread](https://github.com/babel/babel) from 7.9.5 to 7.9.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.9.5...v7.9.6)

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Bump @babel/core from 7.9.0 to 7.9.6 (#30736)

Bumps [@babel/core](https://github.com/babel/babel) from 7.9.0 to 7.9.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.9.0...v7.9.6)

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Bump stylelint-config-twbs-bootstrap from 2.0.1 to 2.0.2 (#30735)

Bumps [stylelint-config-twbs-bootstrap](https://github.com/twbs/stylelint-config-twbs-bootstrap) from 2.0.1 to 2.0.2.
- [Release notes](https://github.com/twbs/stylelint-config-twbs-bootstrap/releases)
- [Commits](https://github.com/twbs/stylelint-config-twbs-bootstrap/compare/v2.0.1...v2.0.2)

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Revert "Update karma.conf.js"

This reverts commit b8abded0afe78519c4c2a185d30e8cf245ed243f.

Revert "Update karma-browserstack-launcher to v1.5.2."

This reverts commit 56190d04dd3f52b27547537e8d80dd632ad495dc.

Bump karma from 5.0.2 to 5.0.4 (#30734)

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.2 to 5.0.4.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v5.0.2...v5.0.4)

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Bump node-sass from 4.14.0 to 4.14.1 (#30733)

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.0 to 4.14.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v4.14.0...v4.14.1)

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Bump @babel/preset-env from 7.9.5 to 7.9.6 (#30732)

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.9.5 to 7.9.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.9.5...v7.9.6)

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Bump terser from 4.6.12 to 4.6.13 (#30730)

Bumps [terser](https://github.com/terser/terser) from 4.6.12 to 4.6.13.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.6.12...v4.6.13)

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Bump linkinator from 2.0.6 to 2.1.0 (#30729)

Bumps [linkinator](https://github.com/JustinBeckwith/linkinator) from 2.0.6 to 2.1.0.
- [Release notes](https://github.com/JustinBeckwith/linkinator/releases)
- [Commits](https://github.com/JustinBeckwith/linkinator/compare/v2.0.6...v2.1.0)

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Bump rollup from 2.7.3 to 2.7.6 (#30728)

Bumps [rollup](https://github.com/rollup/rollup) from 2.7.3 to 2.7.6.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.7.3...v2.7.6)

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Move babel whitelist helpers to a common file (#30723)

Update karma-browserstack-launcher to v1.5.2.

Update karma.conf.js

Use the recommended karma-browserstack-launcher settings

build/build-plugins.js: add missing catch (#30722)

scrollspy.js: remove temporary variable (#30724)

Clean up lint rules (#30721)

* Remove unneeded rule suppression
* Format tests/unit/.eslintrc.json
* build/.eslintrc.json: add strict for consistency

Update codeql.yml (#30719)

Remove `pull_request` event since it's not supported.

Update CSS variables docs to clarify usage and intent

Finish up creating your own components docs

Update function names in migration, clarify tints and shades are Sass variables

Remove mentions of Bootstrap 4 in a few places, replacing with updated guidance where appropriate

 search.js: make the check for URL stricter  (#30695)

v5: Unify spacing across components (#30564)

Co-Authored-By: Martijn Cuppens <martijn.cuppens@gmail.com>

Avoid bad scrollbar replacement into width values (#30690)

Remove borders from iframes by default (#30620)

[type=radio] should always be rounded (#30686)

Add a script to zip the built examples (#30130)

`<pre>`: Disable auto-hiding scrollbar in legacy Edge (#30685)

Disable auto-hiding scrollbar in legacy Edge to avoid overlap, making it impossible to interact with the content.

masthead-followup: Add missing traling slash (#30681)

Update codeql.yml (#30679)

* run the action on PRs too
* specify `javascript` language
* remove comments
* reindent

Move codeql.yml one dir up (#30677)

Add CodeQL Analysis workflow (#30676)

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

Update config.yml (#30671)

Drop closest from SelectorEngine (#30653)

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

CI: remove no longer needed steps (#30674)

The latest `actions/setup-node` prints this info by default

Regenerate package-lock.json (#30673)