feat: upgrade libuv from 1.34.2 to 1.38.0 with new API and platform fixes

Add uv_library_shutdown() and uv__threadpool_cleanup() functions, introduce
UV_UDP_MMSG_CHUNK and UV_UDP_RECVMMSG flags, document cpu_times fields in
milliseconds, adjust priority constants for IBM i PASE, widen ansi_parser_state
to unsigned short on Windows, refactor async spin loop with sched_yield() and
eventfd support on Linux, add ARM yield in cpu_relax(), implement
uv__process_title_cleanup() on BSD and Darwin, replace CoreFoundation
dependency with darwin-stub.h, and fix accept4 detection for FreeBSD ≥10.

deps/libuv/include/uv/version.h

@@ -26,13 +26,13 @@
  * Versions with the same major number are ABI stable. API is allowed to
  * evolve between minor releases, but only in a backwards compatible way.
  * Make sure you update the -soname directives in configure.ac
- * and uv.gyp whenever you bump UV_VERSION_MAJOR or UV_VERSION_MINOR (but
+ * whenever you bump UV_VERSION_MAJOR or UV_VERSION_MINOR (but
  * not UV_VERSION_PATCH.)
  */
 
 #define UV_VERSION_MAJOR 1
-#define UV_VERSION_MINOR 34
-#define UV_VERSION_PATCH 2
+#define UV_VERSION_MINOR 38
+#define UV_VERSION_PATCH 0
 #define UV_VERSION_IS_RELEASE 1
 #define UV_VERSION_SUFFIX ""
 

deps/libuv/include/uv/win.h

@@ -517,7 +517,7 @@ typedef struct {
       /* eol conversion state */                                              \
       unsigned char previous_eol;                                             \
       /* ansi parser state */                                                 \
-      unsigned char ansi_parser_state;                                        \
+      unsigned short ansi_parser_state;                                       \
       unsigned char ansi_csi_argc;                                            \
       unsigned short ansi_csi_argv[4];                                        \
       COORD saved_position;                                                   \