deps: update to libuv v1.26.0

Notable changes since v1.23.2:

- v1.26.0
  - uv_os_uname()
  - unix: don't attempt to invalidate invalid fd
    1ce6393a57
- v1.25.0
  - unix: better handling of unsupported F_FULLFSYNC (fixes #6725)
    6fc797c3fe
  - tty,win: fix Alt+key under WSL
    d2e59bb600
  - fsevents: really watch files with fsevents on macos 10.7+
    2d2af382ce
  - win: fix duplicate tty vt100 fn key
- v1.24.0
  - win,fs: retry if uv_fs_rename fails
    e94c184c7c
    - later [reverted](https://github.com/libuv/libuv/issues/2098) but may be useful reference
  - win: support more fine-grained windows hiding
    4c2dcca27b

src/nvim/event/socket.c

@@ -169,7 +169,7 @@ void socket_watcher_close(SocketWatcher *watcher, socket_close_cb cb)
   FUNC_ATTR_NONNULL_ARG(1)
 {
   watcher->close_cb = cb;
-  uv_close((uv_handle_t *)watcher->stream, close_cb);
+  uv_close(STRUCT_CAST(uv_handle_t, watcher->stream), close_cb);
 }
 
 static void connection_event(void **argv)

src/nvim/os/fs.c

@@ -649,13 +649,6 @@ int os_fsync(int fd)
   int r;
   RUN_UV_FS_FUNC(r, uv_fs_fsync, fd, NULL);
   g_stats.fsync++;
-#ifdef __APPLE__
-  // TODO(justinmk): Remove this after it is fixed in libuv. #6725
-  if (r == UV_ENOTSUP) {
-    int rv = fsync(fd);
-    return rv ? -rv : rv;
-  }
-#endif
   return r;
 }
 

third-party/CMakeLists.txt

@@ -123,8 +123,8 @@ if(WIN32)
   set(LIBUV_URL https://github.com/neovim/libuv/archive/0ed7feb71ca949f7a96ccb102481d17ea1bb5933.tar.gz)
   set(LIBUV_SHA256 813fe763022f19878557c6fde311b6394fb9180caaaab0dd98d8704732234508)
 else()
-  set(LIBUV_URL https://github.com/libuv/libuv/archive/v1.23.2.tar.gz)
-  set(LIBUV_SHA256 30af979c4f4b8d1b895ae6d115f7400c751542ccb9e656350fc89fda08d4eabd)
+  set(LIBUV_URL https://github.com/libuv/libuv/archive/v1.26.0.tar.gz)
+  set(LIBUV_SHA256 e414cf74615b7dae768f0f5667092f1d4975f5067c087bcbe0641e241ebe4693)
 endif()
 
 set(MSGPACK_URL https://github.com/msgpack/msgpack-c/releases/download/cpp-3.0.0/msgpack-3.0.0.tar.gz)