Merge topic 'uv-write'

7ee5fb01c6 cmUVHandlePtr: Add uv_write wrapper to manage request lifetime
bec0dd93a3 cmUVHandlePtr: Add explicit uv_loop_ptr::operator*

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !8997