std::exchange needs <utility> header

GorNishanov · web-flow · commit 4b2f3a615df5 · 2022-06-15T14:07:33.000-07:00
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
 {
