[Snyk] Upgrade socket.io from 4.0.1 to 4.0.2

[snyk-bot]

Snyk has created this PR to upgrade socket.io from 4.0.1 to 4.0.2.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 1 version ahead of your current version.
• The recommended version was released 21 days ago, on 2021-05-06.

The recommended version fixes:

Severity	Issue	PriorityScore (*)	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) SNYK-JS-WS-1296835	336/1000 Why? Recently disclosed, CVSS 5.3	No Known Exploit

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

Release notes

Package name: socket.io

• 4.0.2 - 2021-05-06
  

  Bug Fixes

  • typings: make "engine" attribute public (b81ce4c)
  • properly export the Socket class (d65b6ee)

  Links:

  • Diff: 4.0.1...4.0.2
  • Client release: 4.0.2
  • engine.io version: ~5.0.0
  • ws version: ~7.4.2
• 4.0.1 - 2021-03-31
  

  Bug Fixes

  • typings: add fallback to untyped event listener (#3834) (a11152f)
  • typings: update return type from emit (#3843) (1a72ae4)

  Links:

  • Diff: 4.0.0...4.0.1
  • Client release: 4.0.1
  • engine.io version: ~5.0.0
  • ws version: ~7.4.2

from socket.io GitHub release notes

Commit messages

Package name: socket.io

• 9fff034 chore(release): 4.0.2
• b81ce4c fix(typings): make "engine" attribute public
• d65b6ee fix: properly export the Socket class
• 3665aad docs(examples): basic CRUD application

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