Update .drone.jsonnet

Update .drone.jsonnet

Remove windows-2019 from ci.yml

Change assertions in operator* to match documentation; improves codeg…

…en slightly in the result<U&> case

Change assertions in operator* to match documentation; improves codeg…

…en slightly in the result<U&> case

Merge pull request #125 from igaztanaga/patch-1

Update system_category_message_win32.hpp

Merge pull request #125 from igaztanaga/patch-1

Update system_category_message_win32.hpp

Update .drone.jsonnet

Update .drone.jsonnet

Update documentation