Notable changes:

- **deps**:
  - update ICU to 64.2 (Ujjwal Sharma)
    [#27361](https://github.com/nodejs/node/pull/27361)
  - upgrade npm to 6.9.0 (Kat Marchán)
    [#26244](https://github.com/nodejs/node/pull/26244)
  - upgrade openssl sources to 1.1.1b (Sam Roberts)
    [#26327](https://github.com/nodejs/node/pull/26327)
  - upgrade to libuv 1.28.0 (cjihrig)
    [#27241](https://github.com/nodejs/node/pull/27241)
- **events**:
  - add once method to use promises with EventEmitter (Matteo Collina)
   [#26078](https://github.com/nodejs/node/pull/26078)
- **n-api**:
  - mark thread-safe function as stable (Gabriel Schulhof)
    [#25556](https://github.com/nodejs/node/pull/25556)
- **repl**:
  - support top-level for-await-of (Shelley Vohr)
    [#23841](https://github.com/nodejs/node/pull/23841)
- **zlib**:
  - add brotli support (Anna Henningsen)
    [#24938](https://github.com/nodejs/node/pull/24938)

PR-URL: https://github.com/nodejs/node/pull/27514

The N-API version was bumped to 4 for Node.js 10 in
https://github.com/nodejs/node/pull/25633

Refs: https://github.com/nodejs/node/pull/25633

PR-URL: https://github.com/nodejs/node/pull/27832


Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

This is no longer a flakey test, and should run everywhere.

Backport-PR-URL: https://github.com/nodejs/node/pull/27776
PR-URL: https://github.com/nodejs/node/pull/27241


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

As of libuv 1.28.0, this bug is fixed, and the test can be
moved to parallel. This commit also updates an error code
check to work on Windows.

Backport-PR-URL: https://github.com/nodejs/node/pull/27776
PR-URL: https://github.com/nodejs/node/pull/27241


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Notable changes:

- uv_gettimeofday() has been added.
- Streaming readdir() via the uv_fs_{open,read,close}dir() methods.
- A macOS copyfile() permissions bug has been fixed.
- A bug in uv_interface_addresses() on machines with multiple
  interfaces has been fixed.

Fixes: https://github.com/nodejs/node/issues/27273
Backport-PR-URL: https://github.com/nodejs/node/pull/27776
PR-URL: https://github.com/nodejs/node/pull/27241


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Backport-PR-URL: https://github.com/nodejs/node/pull/27776
PR-URL: https://github.com/nodejs/node/pull/27024


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Avoid circular references that the JS engine cannot see through
because it involves an `async id` ⇒ `domain` link.

Using weak references is not a great solution, because it increases
the domain module’s dependency on internals and the added calls into
C++ may affect performance, but it seems like the least bad one.

Backport-PR-URL: https://github.com/nodejs/node/pull/27749
PR-URL: https://github.com/nodejs/node/pull/25993
Fixes: https://github.com/nodejs/node/issues/23862


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>

Add a simple `WeakReference` utility that we can use until the
language provides something on its own.

Backport-PR-URL: https://github.com/nodejs/node/pull/27749
PR-URL: https://github.com/nodejs/node/pull/25993
Fixes: https://github.com/nodejs/node/issues/23862


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>

Refs: https://github.com/nodejs/node/pull/21093#discussion_r193563156

PR-URL: https://github.com/nodejs/node/pull/21179


Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

For non-Windows platforms, the happy path behavior should be
identical. On Windows, uv_os_uname() attempts to use
RtlGetVersion() before falling back to the deprecated
GetVersionExW() that Node was previously using.

Backport-PR-URL: https://github.com/nodejs/node/pull/27728
PR-URL: https://github.com/nodejs/node/pull/25600


Reviewed-By: Bartosz Sosnowski <bartosz@janeasystems.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Notable changes:
- `statx()` is used to retrieve file birth times on
  supported platforms.
- Improved support of running under Windows safe mode.
- Add support for UDP connected sockets. Several functions
  can now return `UV_EBADF` instead of `UV_EINVAL`.
- SunOS support is improved.

Backport-PR-URL: https://github.com/nodejs/node/pull/27728
PR-URL: https://github.com/nodejs/node/pull/26707


Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Starting in libuv 1.27.0, test-dgram-address.js should expect
EBADF instead of EINVAL.

Backport-PR-URL: https://github.com/nodejs/node/pull/27728
PR-URL: https://github.com/nodejs/node/pull/26707


Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes:
- A bug that could result in 100% CPU utilization in Node
  has been fixed (https://github.com/libuv/libuv/issues/2162)
- Node's report module will now include the entire Windows
  product name (https://github.com/libuv/libuv/pull/2170)

Backport-PR-URL: https://github.com/nodejs/node/pull/27728
PR-URL: https://github.com/nodejs/node/pull/26037
Fixes: https://github.com/nodejs/node/issues/26013
Fixes: https://github.com/nodejs/node/issues/25875


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/27728
PR-URL: https://github.com/nodejs/node/pull/25571


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

Refs: https://github.com/nodejs/node/pull/27124
Refs: https://github.com/nodejs/node/pull/25112

PR-URL: https://github.com/nodejs/node/pull/27727


Reviewed-By: Anna Henningsen <anna@addaleax.net>

On macOS, fs.copyFile() may not respect file permissions. There is a PR
for libuv that should fix this, but until it lands and we can either
float a patch or upgrade libuv, have a known_issues test.

Ref: https://github.com/nodejs/node/issues/26936
Ref: https://github.com/libuv/libuv/pull/2233

PR-URL: https://github.com/nodejs/node/pull/26939
Refs: https://github.com/nodejs/node/issues/26936
Refs: https://github.com/libuv/libuv/pull/2233


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/26898
Refs: https://github.com/nodejs/node/issues/24928


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

This commit extracts code to create sockaddr which is shared by both
UDPWrap::DoBind and UDPWrap::DoSend.

PR-URL: https://github.com/nodejs/node/pull/26070


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

Libuv does not guarantee that handles have their close
callbacks called in the order in which they were added
(and in fact, currently calls them in reverse order).

This patch ensures that the `flush_signal_` handle
is no longer in use (i.e. its close callback has already
been run) when we signal to the main thread that
`~NodeTraceBuffer` may be destroyed.

The same applies for `~NodeTraceWriter`.

Credit for debugging goes to Gireesh Punathil.

Fixes: https://github.com/nodejs/node/issues/25512


Co-authored-by: Gireesh Punathil <gpunathi@in.ibm.com>

PR-URL: https://github.com/nodejs/node/pull/25896


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>

Replace try-catch blocks in tests with `assert.rejects()` and
`assert.throws()`.

PR-URL: https://github.com/nodejs/node/pull/27207
Fixes: https://github.com/nodejs/node/issues/27198


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Ben Coe <bencoe@gmail.com>

If `file` is a file then on Windows `mkdir` on `file/a` returns an
`ENOENT` error while on POSIX the equivalent returns `ENOTDIR`. On the
POSIX systems `ENOTDIR` would break out of the loop but on Windows the
`ENOENT` would strip off the `a` and attempt to make `file` as a
directory. This would return `EEXIST` but the code wasn't detecting
that the existing path was a file and attempted to make `file/a` again.

PR-URL: https://github.com/nodejs/node/pull/27207
Fixes: https://github.com/nodejs/node/issues/27198


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Ben Coe <bencoe@gmail.com>

c-ares rejects *.onion MX query but forgot to set `*bufp` to NULL. This
will occur SegmentFault when free `*bufp`.

I make this quick fix and then will make a PR for c-ares either.

Backport-PR-URL: https://github.com/nodejs/node/pull/27542
PR-URL: https://github.com/nodejs/node/pull/25840
Fixes: https://github.com/nodejs/node/issues/25839
Refs: https://github.com/c-ares/c-ares/blob/955df98/ares_create_query.c#L97-L103
Refs: https://github.com/c-ares/c-ares/blob/955df98/ares_query.c#L124


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/23780
PR-URL: https://github.com/nodejs/node/pull/23551


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/23780
PR-URL: https://github.com/nodejs/node/pull/23551


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/27225
Refs: https://github.com/nodejs/node/issues/26910
Refs: https://github.com/nodejs/node/issues/27219
Refs: https://github.com/nodejs/node/issues/26938
Refs: https://github.com/nodejs/node/issues/23089


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/27658


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/27658


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

`cd deps/openssl/config; make` updates all archs dependant files.

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/26327


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

This is a floating patch against OpenSSL-1.1.1 to generate asm files
with Makefile rules.

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/25381


Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>
Backport-PR-URL: https://github.com/nodejs/node/pull/25688

This adds ARM64 Windows support in the OpenSSL build system.

Since OpenSSL's ARM64 Windows support does not have support for ASM--
that is, VC-WIN64-ARM inherits from VC-noCE-common which has no ASM
files--`openssl_no_asm.gypi` is always used for building. This
essentially forces the 'no-asm' Configure flag.

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/26001
Fixes: https://github.com/nodejs/node/issues/25998


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Signed-off-by: Beth Griggs <Bethany.Griggs@uk.ibm.com>

Since its not packaged, we don't have to delete it, and the Makefile
and update can become a (tiny) bit simpler.

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/26327


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

This updates all sources in deps/openssl/openssl with openssl-1.1.1b.

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/26327


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Particularly, ensure that the commit messages are self-explanatory so
that reviewers can understand that the large commits are the result of a
simple repeatable process. This should make them easier to review.

See: https://github.com/nodejs/node/pull/26327#issuecomment-468745161

Backport-PR-URL: https://github.com/nodejs/node/pull/27419
PR-URL: https://github.com/nodejs/node/pull/26378


Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

On different architectures, it's possible for the compression algorithm
to produce slightly different outputs. So, don't assume we will
always get the same compressed output on all architectures. Instead,
verify that the decompressing pre-compressed string functions
correctly.

Fixes: https://github.com/nodejs/node/issues/25568

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/25697


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/24938


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Co-authored-by: Hackzzila <admin@hackzzila.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/24938


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Refs: https://github.com/nodejs/node/pull/20458



Co-authored-by: Hackzzila <admin@hackzzila.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/24938


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/24938


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Co-authored-by: Anna Henningsen <anna@addaleax.net>

Backport-PR-URL: https://github.com/nodejs/node/pull/27681
PR-URL: https://github.com/nodejs/node/pull/24938


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>

Split the `Zlib` class into `ZlibBase` and `Zlib` classes,
to facilitate introduction of similar streams with minor
implementation differences.

Backport-PR-URL: https://github.com/nodejs/node/pull/25228
PR-URL: https://github.com/nodejs/node/pull/24939


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>