build(deps): bump ws from 8.18.3 to 8.21.1 in /examples

[dependabot]

Bumps ws from 8.18.3 to 8.21.1.

Release notes

Sourced from ws's releases.

8.21.1

Bug fixes

• Empty fragments are now counted toward the limit (a2f4e7c0).
• The default values of the maxBufferedChunks and maxFragments options have been reduced (f197ac65).

8.21.0

Features

• Introduced the maxBufferedChunks and maxFragments options (2b2abd45).

Bug fixes

• Fixed a remote memory exhaustion DoS vulnerability (2b2abd45).

A high volume of tiny fragments and data chunks could be sent by a peer, using modest network traffic, to crash a ws server or client due to OOM.

import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer({ port: 0 }, function () {
const data = Buffer.alloc(1);
const options = { fin: false };
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port});
ws.on('open', function () {
(function send() {
ws.send(data, options, function (err) {
if (err) return;
send();
});
})();
});
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(client close - code: ${code} reason: ${reason.toString()});
});
});
wss.on('connection', function (ws) {
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(server close - code: ${code} reason: ${reason.toString()});
});
});

... (truncated)

Commits

• ae1de54 [dist] 8.21.1
• 8e9511b [ci] Trust Coveralls Homebrew tap
• f197ac6 [fix] Lower default values of maxBufferedChunks and maxFragments
• 8df8265 [ci] Update actions/checkout action to v7
• a2f4e7c [fix] Count empty fragments toward the limit (#2329)
• e79f912 [pkg] Approve install scripts for bufferutil and utf-8-validate
• 4ea355d [doc] Document 32-bit signed integer coercion for option values
• 2120f4c [example] Remove uuid dependency
• 4c534a6 [security] Add latest vulnerability to SECURITY.md
• bca91ad [dist] 8.21.0
• Additional commits viewable in compare view

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[jamiehenson]

Approving. Transitive via the Ably SDK's Node WS transport in /examples. 8.20.1 + 8.21.0 close two memory-safety fixes (uninitialised-memory disclosure on close(TypedArray), and a fragment-flood DoS); the SDK uses a stock WS client so it doesn't hit either path. In-range, CI green.

~ 𝒞𝓁𝒶𝓊𝒹𝑒

[jamiehenson]

@dependabot rebase