Merge pull request #2115 from nlohmann/issue2089

Do not include <ciso646> when using C++17

include/nlohmann/detail/output/serializer.hpp

@@ -3,7 +3,6 @@
 #include <algorithm> // reverse, remove, fill, find, none_of
 #include <array> // array
 #include <cassert> // assert
-#include <ciso646> // and, or
 #include <clocale> // localeconv, lconv
 #include <cmath> // labs, isfinite, isnan, signbit
 #include <cstddef> // size_t, ptrdiff_t
@@ -14,6 +13,7 @@
 #include <type_traits> // is_same
 #include <utility> // move
 
+#include <nlohmann/detail/boolean_operators.hpp>
 #include <nlohmann/detail/conversions/to_chars.hpp>
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>