Bump highlight.js from 9.18.1 to 9.18.5 in /backend

[dependabot]

Bumps highlight.js from 9.18.1 to 9.18.5.

Changelog

Sourced from highlight.js's changelog.

Release v9.18.5

Version 9 has reached end-of-support and will not receive future updates or fixes.

Please see VERSION_10_UPGRADE.md and perhaps SECURITY.md.

• enh: Post-install script can be disabled with HLJS_HIDE_UPGRADE_WARNING=yes
• fix: Deprecation notice logged at library startup a console.log vs console.warn.
  • Notice only shown if actually highlighting code, not just requiring the library.
  • Node.js treats warn the same as error and that was problematic.
  • You (or perhaps your indirect dependency) may disable the notice with the hideUpgradeWarningAcceptNoSupportOrSecurityUpdates option
  • You can also set HLJS_HIDE_UPGRADE_WARNING=yes in your envionment to disable the warning

Example:

hljs.configure({
  hideUpgradeWarningAcceptNoSupportOrSecurityUpdates: true
})

Reference: highlightjs/highlight.js#2877

Release v9.18.4

Version 9 has reached end-of-support and will not receive future updates or fixes.

Please see VERSION_10_UPGRADE.md and perhaps SECURITY.md.

• fix(livescript) fix potential catastrophic backtracking (#2852) [commit]

Version 9.18.3

• fix(parser) Freezing issue with illegal 0 width illegals (#2524)
  • backported from v10.x

Version 9.18.2

Fixes:

• fix(night) Prevent object prototype values from being returned by getLanguage (#2636) night

Commits

• f54e96c 9.18.5
• c34318b fix the link since i saw it
• d2e9bdd include date of last release
• f5e0645 typos and tweaks
• 2e0e8ee changelog
• dc45f7c fix(livescript) fix potential catastrophic backtracking
• 0a2624a update readme
• d571b23 add warning
• ec0bfd5 9.18.4
• 2a04835 bump v9.18.3
• Additional commits viewable in compare view

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