(conan-deps): support Visual compiler 16 for Visual Studio 2019

What does this MR do?

Allow our packages to compile with Visual compiler 16

How to test it?

Build sight.

Associated Issues/Merge Requests

• Issues

  • Closes #359 (closed)

• Merge requests

  • See https://git.ircad.fr/conan/conan-ippe/merge_requests/3
  • See https://git.ircad.fr/conan/conan-vtk/merge_requests/3
  • See https://git.ircad.fr/conan/conan-pcl/merge_requests/5
  • See https://git.ircad.fr/conan/conan-qt/merge_requests/4
  • See https://git.ircad.fr/conan/conan-opencv/merge_requests/6
  • See https://git.ircad.fr/conan/conan-ogre/merge_requests/4
  • See https://git.ircad.fr/conan/conan-itk/merge_requests/3
  • See https://git.ircad.fr/conan/conan-gdcm/merge_requests/3
  • See https://git.ircad.fr/conan/conan-ffmpeg/merge_requests/3
  • See https://git.ircad.fr/conan/conan-camp/merge_requests/4
  • See https://git.ircad.fr/conan/conan-boost/merge_requests/3