Increase default cpp version for CoDiPack.

Author: MaxSagebaum

meson.build

@@ -6,7 +6,8 @@ project('SU2', 'c', 'cpp',
         default_options: ['buildtype=release',
                           'warning_level=0',
                           'c_std=c99',
-                          'cpp_std=c++11'])
+                          'cpp_std=c++17'])
+
 
 fsmod = import('fs')
 if not fsmod.exists('su2preconfig.timestamp')