[Snyk] Security upgrade stylus from 0.54.8 to 0.56.0

[kucherenko]

This PR was automatically created by Snyk using the credentials of a real user.

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
	658/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-SEMVER-3247795	No	Proof of Concept

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

Commit messages

Package name: stylus

The new version differs by 27 commits.

• fc2e630 chore: add url parse guard (#2600)
• 3329f5b deps: remove semver and mkdirp deps and add node17 test (#2641)
• e64ae7d feat: upgrade debug version from v3 to v4 (#2643)
• 33a5fd9 Fix: variable names beginning with a keyword and dash (#2634)
• d2cddcf Fix: `@ import` url() error in dependency resolver (#2632)
• 9cb7635 chore: add new npm ugnore config (#2631)
• dde9868 0.55.0 (#2630)
• fe5bde1 Replace dependency css-parse with css (#2554)
• 7334567 Add deg and fr as exceptions for 0 value unit omission (#2578)
• 57480a4 chore: update history.md and readme.md (#2628)
• f5a02e8 chore: add macos platform test (#2624)
• 1f7f419 fix yaml front matter (#2617)
• 6a96c0f [skip ci]chore: update reademe.md content (#2602)
• 99b05a9 chore: add issue and pull request template (#2606)
• ae9d267 chore: add github actions ci and improve test (#2601)
• 11a0735 Bump lodash from 4.17.19 to 4.17.21 (#2589)
• 7a8e777 Bump glob-parent from 5.1.1 to 5.1.2 (#2592)
• 23d3295 Merge pull request #2571 from dthadi3/ppc64le
• f546669 Travis-ci: Updated nodejs versions 10, 12, 14
• 5b90e45 Travis-ci: added support for ppc64le
• 59bc665 Merge pull request #2549 from mockee/dev
• 96c02de Bug fixes of encoding png image in `url` lib function.
• 8f42760 Merge pull request #2186 from royels/1567
• 775537b Create SECURITY.md

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