[Snyk] Security upgrade socket.io from 1.7.4 to 2.5.0

[loftyduck]

This PR was automatically created by Snyk using the credentials of a real user.

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
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JS-ENGINEIO-3136336	Yes	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 110 commits.

• baa6804 chore(release): 2.5.0
• f223178 fix: prevent the socket from joining a room after disconnection
• 226cc16 fix: only set 'connected' to true after middleware execution
• 05e1278 fix: fix race condition in dynamic namespaces
• 22d4bdf fix: ignore packet received after disconnection
• dfded53 chore: update engine.io version to 3.6.0
• e6b8697 chore(release): 2.4.1
• a169050 revert: fix(security): do not allow all origins by default
• 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
• 47161a6 [chore] Release 2.3.0
• cf39362 [chore] Bump socket.io-parser to version 3.4.0
• 4d01b2c test: remove deprecated Buffer usage (chore(ci): cleanup Travis config karma-runner/karma#3481)
• 8227192 [docs] Fix the default value of the 'origins' parameter ( test/e2e/upstream-proxy.feature is flaky karma-runner/karma#3464)
• 1150eb5 [chore] Bump engine.io to version 3.4.0
• 9c1e73c [chore] Update the license of the chat example (chore(tests): advance the future time by 1000 yrs karma-runner/karma#3410)
• df05b73 [chore] Release 2.2.0
• b00ae50 [feat] Add cache-control header when serving the client source (Unable to browserify JS file in karma karma-runner/karma#2907)
• d3c653d [docs] Add Touch Support to the whiteboard example ([Question] Is there a way to view the webpack bundle that gets produced by running 'grunt karma'? karma-runner/karma#3104)
• a7fbd1a [fix] Throw an error when trying to access the clients of a dynamic namespace (feat(config): socket.io server pingTimeout config option. karma-runner/karma#3355)
• 190d22b [chore] Bump dependencies

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