The "addTrailingSlash" option allows to control whether a trailing
slash is added to the path of the HTTP requests created by the library:

- true (default): "/engine.io/"
- false: "/engine.io"

Related: socketio/socket.io-client#1550

Signed-off-by: iifawzi <iifawzie@gmail.com>

Diff: websockets/ws@8.2.3...8.11.0

The tests are in failure since the 13th November, without any logs from
Saucelabs, so we temporarily disable them until further investigation.

See: https://github.com/socketio/engine.io-client/actions/runs/3453198221

Reference: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

This major bump creates a lot of noise, but it is necessary for
prettier to be able to parse new syntax such as:

- typed imports: `import { type xxx } from ...`
- private attributes: `class A { #b; #c() {} }`

Note: `readyState` and `writeBuffer` are set to public, as they might
be useful for the end user.

This option was added by error during the TypeScript migration.

Related: 587ccf3

A query parameter with a "@" character could be incorrectly parsed.

Example: "/foo?bar=@example.com" => host: example.com

The parse() method is also used in the `socket.io-client` package, to
extract the namespace and the query parameters.

Notes:

- this bug does not seem exploitable, as an attacker would need to
inject the query parameter in the code executed by the client.

- we might use the URL object in the next major version, but that
means dropping support for some platforms such as IE

Reference: https://caniuse.com/url

Thanks to Li Jiantao of STAR Labs (@starlabs_sg) for the responsible
disclosure.

In order to fix "Illegal invocation" errors that happen on some
platforms.

Diff: 6.2.3...6.3.0