Update dependency socket.io to v2.2.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
socket.io	dependencies	minor	2.0.2 -> 2.2.0	source

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Release Notes

socketio/socket.io

v2.2.0

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Features

• add cache-control header when serving the client source (#​2907)

Bug fixes

• throw an error when trying to access the clients of a dynamic namespace (#​3355)

Milestone: 2.2.0
Diff: 2.1.1...2.2.0
Client release: 2.2.0
Diff engine.io: socketio/engine.io@3.2.0...3.3.1
Diff ws: https://github.com/websockets/ws/compare/3.3.1..6.1.2

v2.1.1

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Features

(server) add local flag to the socket object (socketio/socket.io#3219)

socket.local.to('room101').emit(/* */);

Bug fixes

(client) fire an error event on middleware failure for non-root namespace (socketio/socket.io-client#1202)

Milestone: 2.1.1
Diff: 2.1.0...2.1.1 (client diff)

v2.1.0

Compare Source

Features

• add a 'binary' flag (#​3185)

// by default, the object is recursively scanned to check whether it contains some binary data
// in the following example, the check is skipped in order to improve performance
socket.binary(false).emit('plain-object', object);

// it also works at the namespace level
io.binary(false).emit('plain-object', object);

• add support for dynamic namespaces (#​3195)

io.of(/^\/dynamic-\d+$/).on('connect', (socket) => {
  // socket.nsp.name = '/dynamic-101'
});

// client-side
const client = require('socket.io-client')('/dynamic-101');

Bug fixes

• properly emit 'connect' when using a custom namespace (#​3197)
• include the protocol in the origins check (#​3198)

Important note ⚠️ from Engine.IO 3.2.0 release

There are two non-breaking changes that are somehow quite important:

• ws was reverted as the default wsEngine ([chore] Revert to ws as default wsEngine socketio/engine.io#550), as there was several blocking issues with uws. You can still use uws by running npm install uws --save in your project and using the wsEngine option:

var engine = require('engine.io');
var server = engine.listen(3000, {
  wsEngine: 'uws'
});

• pingTimeout now defaults to 5 seconds (instead of 60 seconds): [chore] Update default value of pingTimeout socketio/engine.io#551

Milestone: 2.1.0
Diff: 2.0.4...2.1.0
Engine.IO version: 3.2.x

v2.0.4

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Bug fixes

• do not throw when receiving an unhandled error packet (#​3038)
• reset rooms object before broadcasting from namespace (#​3039)

Milestone: 2.0.4
Diff: 2.0.3...2.0.4

v2.0.3

Compare Source

Bug fixes

• reset rooms object before broadcasting (#​2970)
• fix middleware initialization (#​2969)

Milestone: 2.0.3
Diff: 2.0.2...2.0.3

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