[Snyk] Security upgrade reveal.js from 3.3.0 to 3.4.0

[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
	589/1000 Why? Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-JS-MINIMATCH-1019388	No	No Known Exploit

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

Commit messages

Package name: reveal.js

The new version differs by 111 commits.

• 568c751 fix unclosed code block
• fb8414f 3.4.0
• a144134 Merge branch 'dev' of github.com:hakimel/reveal.js
• 97bb6e9 fragments inherit visibility to avoid conflicts with parent slide visibility
• f2bd9d2 don't show error message while iframe fades in #1577
• 001d4d9 Merge branch 'add-refused-to-display-tips-to-link-preview' of https://github.com/Huxpro/reveal.js into dev
• 40c4db1 always use lowercase reveal.js
• 63d3b59 Merge pull request #1767 from demoneaux/readme
• 4d0f1ad Add note about head.js to readme.
• 90b301d Enable passing options for parsing Markdown.
• 713702a Reduce required Node.js version to 4.0.0.
• 2bd6b56 Merge pull request #1760 from demoneaux/package-json
• 03ac4a2 Reduce required Node.js version to 4.0.0.
• e4e5cc1 Merge pull request #1740 from christinakayastha/feature/printing-remove-slide-number
• f0dfb5b merge package version conflicts
• b4d46d2 update dependencies to work with latest node #1743
• 3de1521 Merge pull request #1743 from haf/patch-1
• e460b2b Merge pull request #1747 from spencermathews/feature/readme-defaults-fix
• 67ac871 Merge pull request #1757 from daanmichiels/correct-copyright
• 775d510 Merge pull request #1756 from jmpp/better-data-trim
• 785dbdd correct copyright message to include contributors
• 35162c1 Better version of data-trim on code snippets
• 21c1faf Update README.md to reflect current defaults in js/reveal.js
• 1918820 add pdf-ready event; dispatched when the presentation is laid out and ready to print

See the full diff

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