[Snyk] Upgrade socket.io from 1.4.8 to 1.7.4

[snyk-bot]

Snyk has created this PR to upgrade socket.io from 1.4.8 to 1.7.4.

:information_source: 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 8 versions ahead of your current version.
• The recommended version was released 4 years ago, on 2017-05-07.

The recommended version fixes:

Severity	Issue	PriorityScore (*)	Exploit Maturity
	Denial of Service (DoS) npm:ws:20171108	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	Mature
	Denial of Service (DoS) npm:ws:20160624	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	No Known Exploit
	Denial of Service (DoS) npm:ws:20171108	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	Mature
	Denial of Service (DoS) npm:ws:20160624	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	No Known Exploit
	Insecure Randomness npm:ws:20160920	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	No Known Exploit
	Insecure Randomness npm:ws:20160920	761/1000 Why? Mature exploit, Has a fix available, CVSS 7.5	No Known Exploit

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

Release notes

Package name: socket.io

• 1.7.4 - 2017-05-07
• 1.7.3 - 2017-02-17
• 1.7.2 - 2016-12-11
• 1.7.1 - 2016-11-27
• 1.7.0 - 2016-11-27
• 1.6.0 - 2016-11-20
• 1.5.1 - 2016-10-24
• 1.5.0 - 2016-10-06
• 1.4.8 - 2016-06-24

from socket.io GitHub release notes

Commit messages

Package name: socket.io

• 0abbd4d [chore] Release 1.7.4
• c89ccd9 [chore] Bump engine.io to version 1.8.4
• a646044 [chore] Release 1.7.3
• 751a6fc [chore] Bump engine.io to version 1.8.3
• 1f59e45 [chore] Release 1.7.2 (#2783)
• 0a7afa8 [chore] Bump engine.io to version 1.8.2 (#2782)
• 1e31769 [fix] Fixes socket.use error packet (#2772)
• 797c9a3 [chore] Release 1.7.1 (#2768)
• 4f93a0b [chore] Release 1.7.0 (#2767)
• 3c98130 [chore] Update client location and serve minified file (#2766)
• 9c23308 [chore] Bump engine.io to version 1.8.1 (#2765)
• 955e5e0 [feature] Add a `local` flag (#2628)
• 0ef55b2 [feature] serve sourcemap for socket.io-client (#2482)
• 4d8e2d3 [docs] Fixed grammar issues in the README.md (#2159)
• d48f848 [docs] Comment connected socket availability for adapters (#2081)
• 57b3863 [chore] Release 1.6.0 (#2757)
• 9e7567d [chore] Bump socket.io-adapter to version 0.5.0 (#2756)
• 2e36799 [chore] Bump engine.io to version 1.8.0 (#2755)
• 9bb5e9d [chore] Bump debug to version 2.3.3 (#2754)
• ff2c15d [perf] Minor code optimizations (#2219)
• a483658 [example] Add disconnection/reconnection logs to the chat example (#2675)
• 4c5dbd8 [fix] Don't drop query variables on handshake (#2745)
• e14a10b [feature] add support for Server#close(callback) (#2748)
• 5a123be [feature] Add support for socket middleware (#2306)

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