[Snyk] Security upgrade postcss-cssnext from 2.10.0 to 3.0.0

[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: postcss-cssnext

The new version differs by 21 commits.

• 03b6017 3.0.0
• cf9fb19 Docs: fix chalk update issue
• b7d6ffd Merge pull request #400 from MoOx/postcss6-upgrade
• 1781dc7 Docs: Fix id of overflow wrap property in index (#393)
• 8b99180 Ensure a version of caniuse-db that includes css-image-set (#380)
• db0f0fa Add a warning for custom property sets that are going to be removed + an option to hide the warning
• cc7c864 Change: support node4+ up to 8
• 7bb55c1 chore: add package-lock.json and yarn.lock files
• 20ae74d Change: upgrade to PostCSS 6
• af5f9c1 Change link to custom media queries specification
• 974e40b Fix PR link
• ed02dc8 2.11.0
• b6f4796 Fix "Unknow browserslist" error
• 480687c Add browsers for testing new futures
• e7cb40b Merge pull request #369 from Semigradsky/patch-1
• 08dd185 Merge pull request #373 from SuperOl3g/master
• 2ca6df0 Fix failed tests.
• a1f8143 update image-set-polyfill package version
• 4c982cd Added: postcss-image-set-polyfill ([Snyk] Security upgrade jest from 20.0.4 to 24.0.0 #43)
• 5200ff2 Add `caniuse-db` as peer dependency.
• d3b21c1 Update features-activation-map

See the full diff

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