Merge topic 'uv-idle-ptr'

70d88a5361 cmUVHandlePtr: Add uv_idle_ptr
17690558c3 cmUVHandlePtr: Add explicit conversion to bool
cd2894a089 cmUVHandlePtr: Conversions to raw pointers are const

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !8980