[Snyk] Upgrade bootstrap from 4.1.3 to 4.3.1

[snyk-bot]

Snyk have raised this PR to upgrade bootstrap from 4.1.3 to 4.3.1.

• The recommended version is 5 minor versions ahead of your current version.
• The recommended version was released 6 months ago, on 2019-02-13.

The recommended version fixes:

Severity	Title	Issue ID
	Cross-site Scripting (XSS)	SNYK-JS-BOOTSTRAP-173700

Release notes

• 4.3.1 - 2019-02-13
  • Security: Fixed an XSS vulnerability (CVE-2019-8331) in our tooltip and popover plugins by implementing a new HTML sanitizer
  • Fixed a small issue with our RFS (responsive font sizes) mixins
• 4.3.0 - 2019-02-11

  Highlights

  • New: Added .stretched-link utility to make any anchor the size of it's nearest position: relative parent, perfect for entirely clickable cards!
  • New: Added .text-break utility for applying word-break: break-word
  • New: Added .rounded-sm and .rounded-lg for small and large border-radius.
  • New: Added .modal-dialog-scrollable modifier class for scrolling content within a modal.
  • New: Added responsive .list-group-horizontal modifier classes for displaying list groups as a horizontal row.
  • Improved: Reduced our compiled CSS by using null for variables that by default inherit their values from other elements (e.g., $headings-color was inherit and is now null until you modifier it in your custom CSS).
  • Improved: Badge focus styles now match their background-color like our buttons.
  • Fixed: Silenced bad selectors in our JS plugins for the href HTML attribute to avoid JavaScript errors. Please try to use valid selectors or the data-target HTML attribute/target option where available.
  • Fixed: Reverted v4.2.1's change to the breakpoint and grid container Sass maps that blocked folks from upgrading when modifying those default variables.
  • Fixed: Restored white-space: nowrap to .dropdown-toggle (before v4.2.1 it was on all .btns) so carets don't wrap to new lines.
  • Deprecated: img-retina, invisible, float, and size mixins are now deprecated and will be removed in v5.

  Links

  • Read the full ship list
  • Review the project board
• 4.2.1 - 2018-12-21

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

• 4.1.3 - 2018-07-24
  • 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.

from bootstrap GitHub Release Notes

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