1.44.2-0

• Update Libuv to 1.44.2 (#585, #588, #608)
  • Adds new function uv.available_parallelism
• Fix build on Cygwin/MSYS (#581)
• uv.os_get_passwd: Better handling of gid/uid (#590, #591)
• Add luarocks test support (#593)
• Simplify luv_thread_dumped (#596)
• uv.fs_opendir and friends: Fix race condition when uv_dir_t pointer doesn't change between allocations (#598)
• Fix leak from fs_scandir whenever it wasn't fully iterated via fs_scandir_next (#601)
• Fix two possible fs_scandir segfaults (#605)
• Bump luajit to latest HEAD of v2.1 branch (#595, #609)