deps: update undici to v5.19.1

Signed-off-by: Matteo Collina <hello@matteocollina.com>
CVE-ID: CVE-2023-23936, CVE-2023-24807
PR-URL: nodejs-private/node-private#388
Refs: GHSA-5r9g-qh6m-jxff
Refs: GHSA-r6ch-mqf9-qc9w
Refs: https://hackerone.com/bugs?subject=nodejs&report_id=1820955
Refs: https://hackerone.com/bugs?subject=nodejs&report_id=1784449
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: mcollina

deps/undici/src/README.md

@@ -178,10 +178,6 @@ Implements [fetch](https://fetch.spec.whatwg.org/#fetch-method).
 
 Only supported on Node 16.8+.
 
-This is [experimental](https://nodejs.org/api/documentation.html#documentation_stability_index) and is not yet fully compliant with the Fetch Standard.
-We plan to ship breaking changes to this feature until it is out of experimental.
-Help us improve the test coverage by following instructions at [nodejs/undici/#951](https://github.com/nodejs/undici/issues/951).
-
 Basic usage example:
 
 ```js
@@ -234,9 +230,15 @@ const data = {
   },
 }
 
-await fetch('https://example.com', { body: data, method: 'POST' })
+await fetch('https://example.com', { body: data, method: 'POST', duplex: 'half' })
 ```
 
+#### `request.duplex`
+
+- half
+
+In this implementation of fetch, `request.duplex` must be set if `request.body` is `ReadableStream` or `Async Iterables`. And fetch requests are currently always be full duplex. More detail refer to [Fetch Standard.](https://fetch.spec.whatwg.org/#dom-requestinit-duplex)
+
 #### `response.body`
 
 Nodejs has two kinds of streams: [web streams](https://nodejs.org/dist/latest-v16.x/docs/api/webstreams.html), which follow the API of the WHATWG web standard found in browsers, and an older Node-specific [streams API](https://nodejs.org/api/stream.html). `response.body` returns a readable web stream. If you would prefer to work with a Node stream you can convert a web stream using `.fromWeb()`.

deps/undici/src/docs/api/Client.md

@@ -38,6 +38,8 @@ Furthermore, the following options can be passed:
 * **maxCachedSessions** `number | null` (optional) - Default: `100` - Maximum number of TLS cached sessions. Use 0 to disable TLS session caching. Default: 100.
 * **timeout** `number | null` (optional) -  Default `10e3`
 * **servername** `string | null` (optional)
+* **keepAlive** `boolean | null` (optional) - Default: `true` - TCP keep-alive enabled
+* **keepAliveInitialDelay** `number | null` (optional) - Default: `60000` - TCP keep-alive interval for the socket in milliseconds
 
 ### Example - Basic Client instantiation