Add support for Visual Studio builds with Meson#49

Merged

kjellahl merged 3 commits intolibsigcplusplus:kjellahl/sigc3-mesonfrom

fanc999:meson.msvc

Dec 20, 2019

Commits on Dec 11, 2019

Meson: Fix Visual Studio builds
fanc999-1
committed

Commits on Dec 20, 2019