libuv: updated to 1.23.2

Version 1.23.2
* unix: return 0 retrieving rss on cygwin
* unix: initialize uv_interface_address_t.phys_addr
* test: handle uv_os_setpriority() windows edge case
* tty, win: fix read stop for raw mode
* Revert "Revert "unix,fs: fix for potential partial reads/writes"" (Jameson
* unix,readv: always permit partial reads to return
* win,tty: fix uv_tty_close()
* doc: remove extraneous "on"
* unix,win: fix threadpool race condition
* unix: rework thread barrier implementation
* aix: switch to libuv's own thread barrier impl
* unix: signal done to last thread barrier waiter
* test: add uv_barrier_wait serial thread test
* unix: optimize uv_fs_readlink() memory allocation
* win: remove req.c and other cleanup
* aix: don't EISDIR on read from directory fd

(adam)