[Snyk] Security upgrade socket.io-client from 2.0.3 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:
  • package.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-client

The new version differs by 40 commits.

• de2ccff chore(release): 2.4.0
• e9dd12a chore: bump engine.io-client version
• 7248c1e ci: migrate to GitHub Actions
• 4631ed6 chore(release): 2.3.1
• 7f73a28 test: fix tests in IE
• 67c54b8 chore: bump engine.io-parser and socket.io-parser
• 15a52ab test: remove arrow function (for now)
• 050108b fix: fix reconnection after opening socket asynchronously (#1253)
• b570025 chore: bump engine.io-client and downgrade debug
• 1fb1b78 chore: remove unused dependencies
• 0c39f14 docs: add section about Debug / logging on the client side (#1278)
• 6ce02ee docs: add server port in the example (#1359)
• f4a4d89 chore: update package-lock.json file
• 3c1d860 chore: bump component-emitter dependency (#1376)
• b7dbbd2 test: fix race condition in the tests
• 661f1e7 [chore] Release 2.3.0
• 71d7b79 [chore] Bump engine.io-client to version 3.4.0
• 8b4a539 [docs] Add CDN link (#1318)
• 40cf185 [ci] use Node.js 10 for compatibility with Gulp v3
• 3020e45 [chore] Release 2.2.0
• 06e9a4c [chore] Bump dependencies
• 4a93871 [chore] Update the Makefile
• eeafa44 [fix] Remove any reference to the `global` variable
• dfc34e4 [chore] Pin zuul version

See the full diff

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