[libc++][ranges] Implement ranges::max_element

Implement ranges::max_element

Reviewed By: Quuxplusone, #libc

Spies: libcxx-commits, mgorny

Differential Revision: https://reviews.llvm.org/D117523
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 8bff206..6b5bc0c 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -763,6 +763,7 @@
 #include <__algorithm/pop_heap.h>
 #include <__algorithm/prev_permutation.h>
 #include <__algorithm/push_heap.h>
+#include <__algorithm/ranges_max_element.h>
 #include <__algorithm/ranges_min_element.h>
 #include <__algorithm/ranges_swap_ranges.h>
 #include <__algorithm/remove.h>