Update to Libuv 1.43.0

[squeek502]

Only new function is uv_ip_name which is a generic function to convert a binary ip4/ip6 address to a string. We only used the protocol-specific versions of this function (uv_ip4_name/uv_ip6_name) internally, and it doesn't look like we have a use for the new function internally, so it's been left unbound and added to the list of unbound (not ruled out) functions in bindcov.sh.

From libuv/libuv#3397:

Notable changes:

• uv_ip_name() has been added.
• On Windows, uv_fs_read() and uv_fs_write() now return UV_EBADF instead of UV_EPERM when the file descriptor was opened with incorrect flags. This matches the behavior on other platforms.
• Streams can be reset and attempted to read from after EOF is read.
• The main thread now has a valid ID instead of NULL.
• uv_cpu_info() now supports aarch64.
• Several minor issues related to mingw32 have been fixed.

Full changelog: https://github.com/libuv/libuv/blob/v1.x/ChangeLog

[zhaozg]

So timely, you are number one.