[Snyk] Security upgrade socket.io from 2.3.0 to 2.4.0

[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:
  • server/package.json
  • server/package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	551/1000 Why? Recently disclosed, Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-WS-1296835	No	No Known Exploit

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

Commit messages

Package name: socket.io

The new version differs by 5 commits.

• 873fdc5 chore(release): 2.4.0
• f78a575 fix(security): do not allow all origins by default
• d33a619 fix: properly overwrite the query sent in the handshake
• 3951a79 chore: bump engine.io version
• 6fa026f ci: migrate to GitHub Actions

See the full diff

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

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[codecov-commenter]

Codecov Report

Merging #144 (ad3c183) into develop (42ccc48) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #144   +/-   ##
========================================
  Coverage    18.47%   18.47%           
========================================
  Files           53       53           
  Lines         1169     1169           
  Branches       205      205           
========================================
  Hits           216      216           
  Misses         953      953           

Flag	Coverage Δ
unittest	18.47% <ø> (ø)

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