Log Message:
libuv: updated to 1.20.2

v1.20.2:
* zos: use custom semaphore
* win: fix registry API error handling
* build: add support for 64-bit AIX
* aix: guard STATIC_ASSERT for glibc work around

v1.20.1:
* doc,fs: improve documentation
* win: return a floored double from uv_uptime()
* doc: clarify platform specific pipe naming
* unix: fix uv_pipe_chmod() on macOS
* unix: work around glibc semaphore race condition
* tcp,openbsd: disable Unix TCP check for IPV6_ONLY
* test,openbsd: use RETURN_SKIP in UDP IPv6 tests
* test,openbsd: fix multicast test
* Revert "win, fs: use FILE_WRITE_ATTRIBUTES when opening files"