std::exchange needs <utility> header

GorNishanov · andreasbuhr · commit c0ba960270c4 · 2022-06-16T13:25:04.000+02:00
diff --git a/lib/static_thread_pool.cpp b/lib/static_thread_pool.cpp
@@ -12,6 +12,7 @@
 #include <cassert>
 #include <mutex>
 #include <chrono>
+#include <utility>
 
 namespace
 {
