Warning in header in MSVC

[chfast]

c:\.hunter\_base\15e27f2\4668f98\6a3ff3d\install\include\cli\configfwd.hpp(120): warning C4458: declaration of 'items' hides class member [C:\projects\evmc\build\test\vmtester\evmc-vmtester.vcxproj]
  c:\.hunter\_base\15e27f2\4668f98\6a3ff3d\install\include\cli\configfwd.hpp(63): note: see declaration of 'CLI::Config::items'

[henryiii]

The warning is correct, we need to rename the variable in that function.

[henryiii]

Please verify this is now fixed in master through #159.