abstraction: replace std::result_of with std::invoke_result

std::result_of is deprecated in C++17

alib2abstraction/src/core/normalize.hpp

@@ -8,7 +8,7 @@ template < typename T >
 struct normalize { };
 template < class ReturnType >
-using normalizationResult = typename std::decay < typename std::result_of < decltype ( & core::normalize < ReturnType >::eval ) ( ReturnType && ) >::type >::type;
+using normalizationResult = typename std::decay_t < typename std::invoke_result_t < decltype ( core::normalize < ReturnType >::eval ), ReturnType && > >;
 /**
  * \brief