Bump bourbon from 4.3.4 to 6.0.0

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Bumps bourbon from 4.3.4 to 6.0.0.

Release notes

Sourced from bourbon's releases.

v6.0.0 - Barrell

Removed

• Installation through Bower is no longer supported.
• The sass gem (the deprecated Ruby Sass) is no longer a runtime dependency.

v5.1.0 - Widow Jane

Added

• $font-stack-system now includes the system-ui value.

Changed

• The _gamma function will use a pow function, if available.

v5.0.1 - Bookers

Fixed

• Fixed an issue that would cause Bourbon to not be found when using SassC.

v5.0.0 - Old Rip Van Winkle

Bourbon 5.0.0 is a major release with lots of changes and removals, which are documented in the change log in each of the alpha and beta releases. There are no changes between v5.0.0-beta.8 and v5.0.0. For information on how to upgrade from v4 to v5, read our migrating guide.

v5.0.0.beta.7

Added

• Added white-space: nowrap; to the hide-visually mixin so that content
  renders on one line and is correctly pronounced by screen readers. You can
  read more about this in Jesse Beach’s article “Beware smushed off-screen
  accessible text.”

Changed

• Removed the default values from the $position and $coordinates arguments
  for the position mixin.
• Updated contrast-switch to calculate contrast based on the WCAG 2.0
  specification. Please note that it is an approximation and we cannot guarantee
  full compliance, though all of our manual testing passed.
• Renamed the $coordinates argument in the position mixin
  to $box-edge-values.
• Updated $font-stack-system to include Avenir Next, Avenir, Lucida
  Grande, Helvetica, Noto, Franklin Gothic Medium, Century Gothic, and
  Liberation Sans. This follows system-fonts by Adam Morse.
• The word-break property was removed from the word-wrap mixin and
  is no longer output.
• Renamed the word-wrap mixin to overflow-wrap to align with the
  name change in the CSS spec.

v5.0.0.beta.6

... (truncated)

Changelog

Sourced from bourbon's changelog.

6.0.0 - 2019-07-10

Removed

• Installation through Bower is no longer supported.
• The sass gem (the deprecated Ruby Sass) is no longer a runtime dependency.

5.1.0 - 2018-07-20

Added

• $font-stack-system now includes the system-ui value.

Changed

• The _gamma function will use a pow function, if available.

5.0.1 - 2018-06-08

Fixed

• Fixed an issue that would cause Bourbon to not be found when using SassC.

5.0.0 - 2018-01-05

Bourbon 5.0.0 is a major release with lots of changes and removals, which are
documented below in each of the alpha and beta releases. There are no changes
between v5.0.0-beta.8 and v5.0.0. For information on how to upgrade from v4 to
v5, read our migrating guide.

[5.0.0-beta.8] - 2017-06-26

Added

• A style property has been added to our package.json, which makes for easy
  importing when using npm-sass, sass-module-importer and others.

Changed

• The triangle mixin no longer has default argument values. The order of the
  arguments also changed: $width and $height now come before $color.

... (truncated)

Commits

• 06d93e1 Bourbon v6.0.0
• b2074cd Remove mention of example gulp project
• d44f7cb Syntax fix
• 6345dff Remove support for Bower
• 9bedac0 Remove sass dependency
• 59abd36 Bump stylelint from 10.0.1 to 10.1.0
• 942f3c5 Update stylelint from 9.10.1 to 10.0.1
• 2d88493 Define Node.js version
• 4827c22 Update Ruby from 2.5.1 to 2.6.3
• 25184a8 Run npm audit fix
• Additional commits viewable in compare view

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