2017-10-31, Version 9.0.0 (Current)

  * Older experimental APIs have been removed.
    [[`d731369b`](https://github.com/nodejs/node/commit/d731369b1d)]
    [#14414](https://github.com/nodejs/node/pull/14414)

* **Errors**
  * Improvements have been made to `buffer` module error messages.
  * The assignment of static error codes to Node.js error continues:
    * `buffer`
    * `child_process`
    * `console`
    * `crypto`
    * `dns`
    * `events`
    * `fs`
    * `http`
    * `inspector`
    * `net`
    * `path`
    * `process`
    * `querystring`
    * `readline`
    * `repl`
    * `streams`
    * `string_decoder`
    * `timers`
    * `tls`
    * `url`
    * `util`
    * `v8`
    * `zlib`

* **Child Processes**
  * Errors are emitted on process nextTick.

* **Domains**
  * The long-deprecated `.dispose()` method has been removed.

* **fs**
  * The `fs.ReadStream` and `fs.WriteStream` classes now use `destroy()`.
  * `fs` module callbacks are now invoked with an undefined context.

* **HTTP/1**
  * A 400 Bad Request response will now be sent when parsing fails.
  * Socket timeout will be set when the socket connects.
  * A bug causing the request `'error'` event to fire twice was fixed.
  * HTTP clients may now use generic `Duplex` streams in addition to `net.Socket`.

* **Intl**
  * The deprecated `Intl.v8BreakIterator` has been removed.

* **Modules**
  * The `require.resolve()` method now supports using custom lookup paths.

* **OS**
  * The `os.EOL` property is now read-only.

* **Timers**
  * `setTimeout()` will emit a warning if the timeout is larger that the maximum
    32-bit unsigned integer.