MSVC changes

Add support for compilation on x64 toolchain (x86 cl.exe was running out of heap space in vm.cpp)

Also took the opportunity to change compile optimisation from /Ox to /O2, as /O2 provides better optimisation than does /Ox

Also, we shouldn't be explicitely setting compiler tool defines (__cpp_lib_bitops), so remove that from types.h

Utilities/types.h

@@ -17,11 +17,6 @@
 #include <limits>
 #include <array>
 
-#ifdef _MSC_VER
-#ifndef __cpp_lib_bitops
-#define __cpp_lib_bitops
-#endif
-#endif
 #include <bit>
 
 #ifndef __has_builtin