Update dependency ws to v8.19.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ws	8.13.0 → 8.19.0

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Release Notes

websockets/ws (ws)

v8.19.0

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Features

• Added the closeTimeout option (#​2308).

Bug fixes

• Handled a forthcoming breaking change in Node.js core (1998485).

v8.18.3

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Bug fixes

• Fixed a spec violation where the Sec-WebSocket-Version header was not added
  to the HTTP response if the client requested version was either invalid or
  unacceptable (#​2291).

v8.18.2

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Bug fixes

• Fixed an issue that, during message decompression when the maximum size was
  exceeded, led to the emission of an inaccurate error and closure of the
  connection with an improper close code (#​2285).

v8.18.1

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Bug fixes

• The length of the UNIX domain socket paths in the tests has been shortened to
  make them work when run via CITGM (021f7b8).

v8.18.0

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Features

• Added support for Blob (#​2229).

v8.17.1

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Bug fixes

• Fixed a DoS vulnerability (#​2231).

A request with a number of headers exceeding theserver.maxHeadersCount
threshold could be used to crash a ws server.

const http = require('http');
const WebSocket = require('ws');

const wss = new WebSocket.Server({ port: 0 }, function () {
  const chars = "!#$%&'*+-.0123456789abcdefghijklmnopqrstuvwxyz^_`|~".split('');
  const headers = {};
  let count = 0;

  for (let i = 0; i < chars.length; i++) {
    if (count === 2000) break;

    for (let j = 0; j < chars.length; j++) {
      const key = chars[i] + chars[j];
      headers[key] = 'x';

      if (++count === 2000) break;
    }
  }

  headers.Connection = 'Upgrade';
  headers.Upgrade = 'websocket';
  headers['Sec-WebSocket-Key'] = 'dGhlIHNhbXBsZSBub25jZQ==';
  headers['Sec-WebSocket-Version'] = '13';

  const request = http.request({
    headers: headers,
    host: '127.0.0.1',
    port: wss.address().port
  });

  request.end();
});

The vulnerability was reported by Ryan LaPointe in #​2230.

In vulnerable versions of ws, the issue can be mitigated in the following ways:

1. Reduce the maximum allowed length of the request headers using the
   --max-http-header-size=size and/or the maxHeaderSize options so
   that no more headers than the server.maxHeadersCount limit can be sent.
2. Set server.maxHeadersCount to 0 so that no limit is applied.

v8.17.0

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Features

• The WebSocket constructor now accepts the createConnection option (#​2219).

Other notable changes

• The default value of the allowSynchronousEvents option has been changed to
  true (#​2221).

This is a breaking change in a patch release. The assumption is that the option
is not widely used.

v8.16.0

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Features

• Added the autoPong option (01ba54e).

v8.15.1

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Notable changes

• The allowMultipleEventsPerMicrotask option has been renamed to
  allowSynchronousEvents (4ed7fe5).

This is a breaking change in a patch release that could have been avoided with
an alias, but the renamed option was added only 3 days ago, so hopefully it
hasn't already been widely used.

v8.15.0

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Features

• Added the allowMultipleEventsPerMicrotask option (93e3552).

v8.14.2

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Bug fixes

• Fixed an issue that allowed errors thrown by failed assertions to be
  swallowed when running tests (7f4e1a7).

v8.14.1

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Bug fixes

• Improved the reliability of two tests for CITGM (fd3c64c).

v8.14.0

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Features

• The WebSocket constructor now accepts HTTP(S) URLs (#​2162).
• The socket argument of server.handleUpgrade() can now be a generic
  Duplex stream (#​2165).

Other notable changes

• At most one event per microtask is now emitted (#​2160).

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