Update libuv version number (#1666)

Update the libuv version to work around a mingw64 bug, refer to:
  https://github.com/libuv/libuv/pull/3345

core/iwasm/libraries/libc-uvwasi/libc_uvwasi.cmake

@@ -3,7 +3,7 @@
 
 set (LIBC_WASI_DIR ${CMAKE_CURRENT_LIST_DIR})
 
-set (LIBUV_VERSION v1.42.0)
+set (LIBUV_VERSION v1.44.2)
 
 add_definitions (-DWASM_ENABLE_LIBC_WASI=1 -DWASM_ENABLE_UVWASI=1)