[Snyk] Security upgrade gulp-autoprefixer from 3.1.0 to 6.0.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	479/1000 Why? Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-POSTCSS-1255640	Yes	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: gulp-autoprefixer

The new version differs by 21 commits.

• dfe3919 6.0.0
• c225cbd Upgrade `autoprefixer` and `postcss`
• ea0b7f8 Require Node.js 6
• 18a27be 5.0.0
• e526a78 Meta tweaks
• e954e6e Update sourcemap paths to be relative to `file.base` (Add autoprefixer plouc/mozaik#92)
• 7828646 Upgrade to Autoprefixer 8 (Switch to redux and remove usage of Mixin plouc/mozaik#96)
• d008588 4.1.0
• 27816c3 Meta tweaks
• 94f3447 Drop dependency on deprecated gulp-util ([WIP] Add the ability to set individual timers plouc/mozaik#94)
• 60aead3 Test against Node.js v8 (Create a new theme plouc/mozaik#90)
• 5188604 4.0.0
• 04814b7 Rewrite tests to use AVA
• 7df69ba ES2015ify, bump postcss, require Node.js 4
• 0a92d79 Update to Autoprefixer 7 (Mozaïk should provide a way to define dashboard templates plouc/mozaik#80)
• cd022c8 Fix tests
• 90f8f7c Improve the tip (Add ability to define custom apis poll interval plouc/mozaik#75)
• a276609 3.1.1
• f6a972d trying out something new
• 324ff05 minor tweaks
• fb035b5 add tip about PostCSS plugins

See the full diff

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