[Snyk] Security upgrade showdown from 1.8.6 to 1.9.1

[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
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Prototype Pollution SNYK-JS-YARGSPARSER-560381	No	Proof of Concept

Commit messages

Package name: showdown

The new version differs by 41 commits.

• 483e51f release 1.9.1
• 5cc3fcc update dev dependencies
• 1cd281f fix(openLinksInNewWindow): add rel="noopener noreferrer" to links
• 58208e5 update dependencies
• 8afa1ff release 1.9.0
• cc1b955 prep release
• a894a0e docs: add mention to makeMd() to reamde.md
• e4b0e69 feat(converter.makeMarkdown): add an HTML to MD converter
• 5c0d67e fix(italicsAndBold): Make italicsAndBold lazy (#608)
• afbaec9 docs(donations.md): update
• 0087148 docs(readme.md): update
• 69b816e docs(completeHTMLDocument): Change completeHTMLDocument comment (#610)
• a608114 docs(readme.md): update readme.md
• 9907c95 add md-page to people who use (#604)
• 3fe5e9a Update DONATIONS.md
• 012f8d6 Update DONATIONS.md
• 47428b7 Update README.md
• c96c3ef Update README.md
• dc70e68 docs(emoji): Change emoji comment (#611)
• 0c6f345 fix(italicsAndBold): Make italicsAndBold lazy (#608)
• e6aeb61 release 1.8.7
• 828c32f fix(gfm-codeblocks): leading space no longer breaks gfm codeblocks
• dfeb1e2 fix(mentions): allow for usernames with dot, underscore and dash
• 79ed024 test: add test for issue 585

See the full diff

Check the changes in this PR to ensure they won't cause issues with your project.

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