:construction: Begin moving pugixml to modern(ish) CMake
:construction: Begin moving pugixml to modern(ish) CMake

:arrow_up: Bump CMake minimum to 3.4
:bug: pugixml no longer requires a C compiler to be found or set to
compile correctly. This speeds up configuration and building on windows.
:construction: Begin laying groundwork to backport MSVC_RUNTIME_LIBRARY
property

zeux/pugixml,zeux/pugixml,zeux/pugixml,zeux/pugixml