[Snyk] Security upgrade codemirror from 5.51.0 to 5.54.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

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Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • packages/syntax-highlighter/package.json
  • packages/syntax-highlighter/package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) SNYK-JS-CODEMIRROR-569611	No	No Known Exploit

Commit messages

Package name: codemirror

The new version differs by 87 commits.

• a5497d1 Mark version 5.54.0
• 4377c08 [gfm mode] add fencedCodeBlockDefaultMode option
• e56014c [soy mode] Fix bug with "map" in type name
• 8facd90 [vim] Allow Ex-Commands with non-word names
• 25e7a32 [match-highlighter] Fix issue in highlighting non-alphanumeric tokens
• b6ac63e Proper escaping of \s
• 890cb6b [javascript mode] Fix a runaway regexp
• 0884405 [runmode addon] Add support for lookahead
• a810aee [mode/meta] Remove unwanted space in TiddlyWiki mode name
• 8e260c2 [dart mode] Add `late` and `required` keywords, `Null` and `Never` types
• 0de283c [tcl mode] Add # as a lineComment
• 2e841f6 Add a sponsors section to the website
• 632f30b Increase size of scrollbar-hack gap
• a9774d9 [javascript operator] Properly implement optional chaining operator
• b6a75e5 [matchbrackets addon] Disable highlighting when the editor isn't focused
• c41dec1 Also ignore clipboard events inside widgets in contenteditable input mode
• dfa4bda [runmode standalone] Add support for globalThis
• 6890f98 Don't mess with the selection when refocusing a text field
• a67ed9a [javascript mode] Allow class fields in non-TS mode
• 46f2723 [javascript mode] Add support for private properties
• 0b64369 Disable scroll workaround in start-drag handler for Safari
• ad54953 [vim bindings] Remove a duplicate entry in defaultExCommandMap
• e8c0a77 Disable scroll-on-focus in drag focus kludge
• 64e4504 [python mode] Somewhat improve handling of format specs in format strings

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