Update dependency bootstrap to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
bootstrap	dependencies	major	^3.3.7 -> ^4.0.0	homepage, source

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Release Notes

twbs/bootstrap

v4.2.1

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Bump to v4.2.1 to republish package on npm. See v4.2.0 release notes for changes introduced in v4.2.

v4.1.3

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• Fixed: Removed the :not(:root) selector from our svg Reboot styles, resolving an issue that caused all inline SVGs ignore vertical-align styles via single class due to higher specificity.
• Fixed: Moved the browserslist config from our package.json to a separate file to avoid unintended inherited browser settings across npm projects.
• Fixed: Buttons in custom file inputs are once again clickable when focused.
• Improved: Bootstrap's plugins can now be imported separately in any contexts because they are now UMD ready.
• Improved: .form-controls now have a fixed height to compensate for differences in computed height across different types. This also fixes some IE alignment issues.
• Improved: Added Noto Color Emoji to our system font stack for better rendering in Linux OSes.

v4.1.2

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• Fixed an XSS vulnerability in tooltip, collapse, and scrollspy plugins
• Improved how we query elements in our JavaScript plugins
• Inline SVGs now have the same vertical alignment as images
• Fixed issues with double transitions on carousels
• Added Edge and IE10-11 fallbacks to our floating labels example
• Various improvements to form controls, including disabled states on file inputs and unified focus styles for selects

Checkout the v4.1.2 ship list and GitHub project for the full details.

v4.1.1

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Our first patch release for Bootstrap 4! Here's a quick rundown of some of the changes:

• Added validation styles for file inputs
• Improved printing of dark tables
• Suppressed that text-hide deprecation notice by default
• Cleaned up some JS globals and improve coverage
• Bumped dependencies, namely Jekyll
• Fixed docs issue with incorrect name for our monospace font utility

Checkout the v4.1.1 ship list and GitHub project for the full details.

v4.1.0

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• Added new custom range form control.
• Added new .carousel-fade modifier to switch carousel from horizontal sliding to crossfade.
• Added new .dropdown-item-text for plaintext dropdown items.
• Added new .flex-fill, .flex-grow-*, and .flex-shrink-* utilities.
• Added new .table-borderless variant for tables.
• Added new .text-monospace utility.
• Added new .text-body (default body color), .text-black-50 (50% opacity black), and .text-white-50 (50% opacity white) utilities.
• Added new .shadow-* utilities for quickly adding box-shadows.
• Added ability to disable Popper's positioning in dropdowns.
• Fixed longstanding issue with Chrome incorrectly rendering cards across CSS columns.
• Deprecated .text-hide—you'll see a warning during compilation—as it's a dated and undocumented feature.
• Fixed up Dashboard and Offcanvas examples across Firefox and IE.
• Breadcrumbs can now use non-string values as dividers.
• Updated our Theming docs to confirm you cannot use CSS variables in media queries (sorry folks!).

Be sure to look at the ship list and project board for more details on all our fixes.

v4.0.0

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Our first stable v4 release! 🎉

Highlights:

• Brand new examples and overhauls for existing ones.
• Additional border utilities have been added and the default border-color for them darkened from $gray-200 to $gray-300.
• Pagination focus styles now match button and input focus state.
• Added responsive .order-0 classes to reset column order.
• Improved examples of form validation documentation by adding tooltip examples and more.
• New documentation added for using our CSS variables to the Theming page.
• Improved consistent across browsers when printing.
• Sass map extends and docs
• New and improved print display utilities

Project board

For more details, visit #​25098.

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