Bumps [linkinator](https://github.com/JustinBeckwith/linkinator) from 1.6.0 to 1.6.3.
- [Release notes](https://github.com/JustinBeckwith/linkinator/releases)
- [Commits](https://github.com/JustinBeckwith/linkinator/compare/v1.6.0...v1.6.3

)

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

Bumps [rollup](https://github.com/rollup/rollup) from 1.26.2 to 1.26.3.
- [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/v1.26.2...v1.26.3

)

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

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.7.0 to 9.7.1.
- [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/9.7.0...9.7.1

)

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

Bumps [hugo-bin](https://github.com/fenneclab/hugo-bin) from 0.47.0 to 0.47.1.
- [Release notes](https://github.com/fenneclab/hugo-bin/releases)
- [Commits](https://github.com/fenneclab/hugo-bin/compare/v0.47.0...v0.47.1

)

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

Bumps [rollup](https://github.com/rollup/rollup) from 1.26.0 to 1.26.2.
- [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/v1.26.0...v1.26.2

)

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

* Update stylelint-config-twbs-bootstrap to 0.9.0

* Add `scss/dollar-variable-default` rule

This rule was removed from `stylelint-config-twbs-bootstrap` (https://github.com/twbs/stylelint-config-twbs-bootstrap/pull/27) in favour to add it here.

Bumps [rollup](https://github.com/rollup/rollup) from 1.25.2 to 1.26.0.
- [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/v1.25.2...v1.26.0

)

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

Bumps [eslint](https://github.com/eslint/eslint) from 6.5.1 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.5.1...v6.6.0

)

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

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.6.5 to 9.7.0.
- [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/9.6.5...9.7.0

)

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

Bumps [stylelint-config-twbs-bootstrap](https://github.com/twbs/stylelint-config-twbs-bootstrap) from 0.7.0 to 0.8.0.
- [Release notes](https://github.com/twbs/stylelint-config-twbs-bootstrap/releases)
- [Commits](https://github.com/twbs/stylelint-config-twbs-bootstrap/compare/v0.7.0...v0.8.0

)

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

Bumps [node-sass](https://github.com/sass/node-sass) from 4.12.0 to 4.13.0.
- [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/v4.12.0...v4.13.0

)

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

Bumps [rollup](https://github.com/rollup/rollup) from 1.25.1 to 1.25.2.
- [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/v1.25.1...v1.25.2

)

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

Bumps [find-unused-sass-variables](https://github.com/XhmikosR/find-unused-sass-variables) from 0.6.0 to 1.0.2.
- [Release notes](https://github.com/XhmikosR/find-unused-sass-variables/releases)
- [Commits](https://github.com/XhmikosR/find-unused-sass-variables/compare/v0.6.0...v1.0.2

)

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

Bumps [glob](https://github.com/isaacs/node-glob) from 7.1.4 to 7.1.5.
- [Release notes](https://github.com/isaacs/node-glob/releases)
- [Changelog](https://github.com/isaacs/node-glob/blob/master/changelog.md)
- [Commits](https://github.com/isaacs/node-glob/compare/v7.1.4...v7.1.5

)

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

Bumps [rollup](https://github.com/rollup/rollup) from 1.23.1 to 1.25.1.
- [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/v1.23.1...v1.25.1

)

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

Bumps [karma](https://github.com/karma-runner/karma) from 4.3.0 to 4.4.1.
- [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/v4.3.0...v4.4.1

)

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

Bumps [stylelint-config-twbs-bootstrap](https://github.com/twbs/stylelint-config-twbs-bootstrap) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/twbs/stylelint-config-twbs-bootstrap/releases)
- [Commits](https://github.com/twbs/stylelint-config-twbs-bootstrap/compare/v0.6.0...v0.7.0

)

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

By the time v5 stable will be out, 8 will be EOL (December 2019).

Now there's only one command needed to run the docs: `npm run docs-serve`.

Also, simplify the npm scripts.

* Merge js-lint scripts into one script.

* Merge stylelint scripts into one.

Kept `eslint@6.1.0` since the newer versions have a bug that affects us.