- linux: introduce io_uring support libuv/libuv#3952
- src: add new metrics APIs libuv/libuv#3749
- unix,win: give thread pool threads an 8 MB stack libuv/libuv#3787
- win,unix: change execution order of timers libuv/libuv#3927

Fixes: nodejs#43931
Fixes: nodejs#42496
Fixes: nodejs#47715
Fixes: nodejs#47259
Fixes: nodejs#47241
PR-URL: nodejs#48078
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Debadree Chatterjee <debadree333@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>