[Snyk] Security upgrade socket.io from 1.7.4 to 2.2.0

[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:
  • play-with-docker/example-voting-app/result/package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	704/1000 Why? Has a fix available, CVSS 9.8	Improper Input Validation SNYK-JS-SOCKETIOPARSER-3091012	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 91 commits.

• df05b73 [chore] Release 2.2.0
• b00ae50 [feat] Add cache-control header when serving the client source (#2907)
• d3c653d [docs] Add Touch Support to the whiteboard example (#3104)
• a7fbd1a [fix] Throw an error when trying to access the clients of a dynamic namespace (#3355)
• 190d22b [chore] Bump dependencies
• 7b8fba7 [test] Update Travis configuration
• e5f0cea [docs] Use new JavaScript syntax inside the README (#3360)
• 7e35f90 [docs] fix `this` scope in the chat example
• 2dbec77 [chore] Update issue template
• d97d873 [docs] update README.md (#3309)
• e0b2cb0 [chore] Release 2.1.1
• 1decae3 [feat] Add local flag to the socket object (#3219)
• 0279c47 [docs] Convert the chat example to ES6 (#3227)
• 2917942 [docs] Clarify private messaging in the emit cheatsheet (#3232)
• db831a3 [chore] Release 2.1.0
• ac945d1 [feat] Add support for dynamic namespaces (#3195)
• ad0c052 [docs] Add note in docs for `origins(fn)` about `error` needing to be a string. (#2895)
• 1f1d64b [fix] Include the protocol in the origins check (#3198)
• f4fc517 [fix] Properly emit 'connect' when using a custom namespace (#3197)
• be61ba0 [docs] Add link to a Dart client implementation (#2940)
• c0c79f0 [feat] Add support for dynamic namespaces (#3187)
• dea5214 [chore] Bump superagent and supertest versions (#3186)
• b1941d5 [chore] Bump engine.io to version 3.2.0
• a23007a [docs] Update license year (#3153)

See the full diff

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[ayoinc]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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